Objective To understand the trend of disease burden of cerebral hemorrhage and cerebral infarction from 2012 to 2018 in Chongqing, and provide the suggestion for conducting the pertinent intervention. Methods The data of stroke cases in Chongqing from 2012 to 2018 were from the National System for Registering and Reporting Cardiovascular and Cerebrovascular Events of Chinese Center for Disease Control and Prevention. The incidence, standardized morbidity, mortality, standardized mortality, disability adjusted life years （DALY）, years of life lost （YLL） and years lived with disability （YLD） were calculated for stroke, cerebral hemorrhage and cerebral infarction. The change trend of rate was indicated by annual percentage change （APC）, and the t-test was carried out on APC. Results The rate of YLD of stroke, cerebral hemorrhage and cerebral infarction increased from 3.37‰, 0.91‰, 2.46‰ in 2012 to 4.03‰, 1.01‰, 2.64‰ in 2018 respectively. And its APC was 3.67%, 4.39% and 1.61% respectively. The change trend of YLD of stroke was statistically significant （P<0.01）. The rate of YLL of stroke, cerebral hemorrhage and cerebral infarction increased from 18.38‰, 11.61‰, 3.29‰ in 2012 to 20.10‰, 12.01‰, 5.40‰ in 2018 respectively. And its APC was 1.01%, 0.40% and 7.68% respectively. The change trend of YLL of cerebral infarction was statistically significant （P<0.01）. The rate of DALY of stroke, cerebral hemorrhage and cerebral infarction increased from 21.75‰, 12.52‰, 5.75‰ in 2012 to 24.13‰, 13.02‰, 8.04‰ in 2018 respectively. And its APC was 1.51%, 0.70% and 5.34% respectively. The change trend of DALY of cerebral infraction was statistically significant （P<0.01）. Conclusion The rate of DALY of stroke in Chongqing was lower than national average level. The proportion of cerebral hemorrhage was over 50% of all stroke. The disease burden of cerebral infraction increased year by year in Chongqing. It should be attached importance on stroke control and prevention to curb the rapid increasing of cerebral infarction and raise the capability for cerebral hemorrhage.

Objective To understand the status and influencing factors of overweight and obesity among preschool children in Dongcheng District of Beijing, and provide basis for balanced dietary interventions. Methods Using stratified cluster random sampling method, 18 kindergartens in Dongcheng District of Beijing were selected to investigate the dietary status of preschool children in middle and senior classes, and their height and weight were measured. Chi-square test and Logistic regression model were used for statistical analysis. Results A total of 2 985 cases were analyzed in this study, 8.17% and 8.21% of the children were overweight and obesity, the prevalence of overweight was 9.14% in boys and 7.14% in girls, the prevalence of obesity was 11.41% in boys and 4.78% in girls, the difference was statistically significant（P<0.01）. The prevalence of obesity increased with age（P<0.01）. Multivariate Logistic regression analysis showed that boys （OR= 1.839）, fresh / pure fruit and vegetable juice consumption frequency was 2-4 times a week （OR= 1.383）, drinking sports drinks （OR= 1.342） were risk factors for overweight / obesity; cake consumption frequency of 2-4 times a week （OR= 0.716） and ≥ 5 times a week （OR= 0.403） and nut food consumption frequency of 2-4 times a week （OR= 0.760） were protective factors for overweight / obesity. Conclusion The prevalence of overweight and obesity among preschool children in Dongcheng District of Beijing is relatively high, which is closely related to their eating habits. Synthesized prevention and control measures for children, families, kindergartens and society should be taken to reduce the rate of overweight and obesity in preschool children.

Objective To analyze the temporal and spatial distribution of primary and secondary（P&S） syphilis in different periods in Jingzhou City, so as to provide reference for rational allocation of health resources. Methods The data of P&S syphilis cases in Jingzhou City from 2011 to 2019 were collected. According to the incidence rate, the epidemic stages of P&S syphilis in Jingzhou City were divided into three periods： 2011-2013 （high）, 2014-2016 （middle）, 2017-2019 （low）. The temporal and spatial trends of P&S syphilis were analyzed by trend surface analysis, spatial autocorrelation analysis and spatio-temporal scanning. Results From 2011 to 2019, 4 715 cases of P&S syphilis were reported in Jingzhou City, with an average annual incidence rate of 9.19/100,000, and the incidence rate was decreasing （P<0.01）. Trend surface analysis showed that the high incidence area of P&S syphilis in Jingzhou City gradually shifted from Northwest （2011-2013） to Central （2017-2019）. The global spatial autocorrelation analysis showed that the incidence rate of P&S syphilis in Jingzhou City was positively correlated in 2011-2013 and 2014-2016, and there was spatial clustering （Moran 's I=0.333 6, 0.210 5, both P<0.01）. Local spatial autocorrelation analysis showed that the P&S syphilis high-value clustering areas mainly concentrated in some towns of Gongan County, Jingzhou District, Shashi District and Jiangling County in 2011-2013 （P<0.05）, mainly concentrated in some towns of Jingzhou District, Shashi District and Jianli County in 2014-2016 （P < 0.05）, and mainly concentrated in some towns of Jianli County and Shashi District in 2017-2019 （P < 0.05）. Spatio-temporal scanning showed that main clustering area was in Gongan County and Jiangling County, with a total of 24 townships （streets）, the clustering time was from April 11, 2011 to August 15, 2011 （RR=4.14, LLR=93.55）. Conclusion During the three periods, there is spatial aggregation of P&S syphilis in Jingzhou City, and the high incidence area is gradually reduced. From 2017 to 2019, some towns in Jianli County and Shashi District are high incidence areas, and prevention and control of the area should be strengthened.

Objective To analyze the awareness of AIDS knowledge, behavior characteristics and the epidemic trend of HIV infection among men who have sex with men （MSM） in Xi'an City, so as to provide the basis for formulating AIDS prevention and control strategies. Methods Through a cross-sectional sentinel survey of MSM from 2016 to 2019, questionnaire investigation and serological tests were performed by NGO from April to July every year. Logistic regression analysis was used to analyze the influencing factors of AIDS awareness. Results A total of 1600 cases were investigated, with average age of （28.78 ± 8.48）years.Of the participants, 79.31% were Shanxi registration, 79.06% were unmarried, 77.75% had junior college degree and above, and 75.25% were homosexual, up to 95.06% made friends through the internet and software. The awareness rate of AIDS knowledge was 91.38%. 41.1% of MSM who answered correctly about the condom question showed separation of knowledge and behavior. The awareness rates of AIDS among MSM with high school or secondary specialized school education （OR= 3.279）, junior college or above （OR= 4.738） were higher than that of junior high school and below. Heterosexual （OR=0.240） was lower than homosexual. The incidence of condom use in anal sex, condom use in commercial homosexual sex, proportion of heterosexual sex in the last six months and the proportion of sexually transmitted diseases diagnosed in the last year were on the rise, and condom use in heterosexual sex in the last six months and intervention in the last year were in decline. Conclusion Propaganda should be strengthened for middle-aged and elderly, married MSM in floating population gathering areas and fixed places, personalized intervention service package should be purchased, STD diagnosis and treatment services should be standardized, and an internet model for MSM intervention should be explored.

Objective To understand smoking status and analyze influencing factors of current smoking among college students in Wuhan, so as to provide a scientific basis for tobacco control on campus. Methods Using stratified cluster sampling method, 3 000 sophomores from four universities in Wuhan were selected to conduct a self-administered questionnaire survey. A Chi-square test and Logistic regression analysis were used to analyze smoking behavior and influencing factors of current smoking in college students. Results 27.33% of 2 891 college students had attempted smoking behavior, with an average age of （15 ± 4.70） years. The current smoking rate was 14.08% （407/2 891） among college students in Wuhan, 43.73%（178/407）and 24.08% （98/407）of current smokers chose to smoke in dormitories and toilets. Logistic regression analysis showed that college students who were male（OR=4.48）, studying in junior college（OR=1.38）, self-confessed to be in poor health（OR=2.90）, drinking alcohol（OR=4.30）, having smoking family members（OR=3.42）, with monthly living expenses of 1 000~1 999 and 2 000 and above（OR=1.59、2.52） were more likely to smoke now. Conclusion The smoking rate of college students in Wuhan is high. In order to effectively reduce the smoking rate, colleges and universities should formulate tobacco control intervention measures for different groups according to the characteristics of college students' smoking behavior, carry out health education and publicity, prohibit tobacco advertising activities, encourage and help college students to quit smoking and create a smoke-free environment on campus.

Objective To analyze the status of low birth weight （LBW） of newborns in Nanning, Guangxi, and to study high-risk factors to provide a basis for formulating targeted maternal and child health care measures in this area. Methods Based on the “Guangxi Gui Women and Children's Health Management Information System”, the demographic characteristics, pregnancy conditions, obstetrics and delivery records and neonatal data of pregnant and lying-in women established in Nanning, Guangxi in 2018 were collected. The descriptive epidemiological analysis method was used to analyze the occurrence of LBW, and single and multiple factor analysis methods were used to analyze the high-risk factors of LBW. Results There were 47 339 registered newborns in Nanning, Guangxi in 2018, including 3 229 cases of LBW. The incidence of LBW was 6.82%. The results of multivariate analysis showed that the pre-pregnancy weight of pregnant women was too light （OR=1.211）, insufficient weight gain during pregnancy （OR=3.423）, high-risk pregnancy （OR=1.920）, multiple pregnancy （OR=9.533）, hemoglobin concentration in early pregnancy <110 g/L （OR=1.251）, and premature delivery （OR=31.860） were risk factors for neonatal LBW. Conclusion The incidence of LBW in Nanning, Guangxi is equivalent to the national average. Pre-pregnancy BMI, weight gain during pregnancy, preterm birth, high-risk pregnancy, multiple pregnancy, and hemoglobin concentration in early pregnancy are high-risk factors for LBW.

Objective To analyze the status of thyroid nodules in physical examination population and explore its influencing factors, so as to provide reference for the publicity and education of healthy people. Methods The data collection and thyroid nodule examination were performed on the population of a hospital in Liaoyang City, Liaoning Province who underwent a physical examination from September 2018 to August 2020. The descriptive epidemiological analysis method was used to analyze, and single and multiple factor analysis methods were used to analyze the factors affecting the detection of thyroid nodules. Results A total of 22 557 healthy subjects in Liaoyang City were surveyed. Male accounted for 48.9% and female accounted for 51.1%. They were 19-76 years old, and the majority was 51-69 years old, accounting for 40.6%; the residential area was mainly urban, accounting for 63.1%. Thyroid nodules were detected in 1 258 cases, and the detection rate was 5.6%, of which 63.3% were single nodules and 65.6% were solid nodules. Multivariate Logistic regression analysis showed that female （OR=3.597）, older people （OR=5.789）, greater body mass index （OR=3.142）, depression （OR=8.117）, anxiety （OR=7.591）, abnormal blood pressure （OR=3.124）, abnormal blood glucose （OR=3.337） in healthy subjects had higher risk of thyroid nodules. Conclusion The detection rate of thyroid nodules in physical examination population in Liaoyang City is relatively high, and single and solid nodules are more common. The incidence is affected by gender, age, weight, mental state, blood pressure, and blood glucose. Early prevention and treatment measures of thyroid nodule should be strengthened.

Objective To explore the occurrence, case characteristics and influencing factors of neonatal jaundice. Methods The data of newborns and their mothers from July 2018 to June 2020 in a hospital in Zhumadian City were analyzed. Descriptive epidemiological analysis method was used to analyze the occurrence of neonatal jaundice, and single and multiple factor analysis methods were used to analyze the influencing factors of neonatal jaundice. Results A total of 1 359 pairs of valid newborns and their mothers were collected. The age of the newborns was 2-24 days and the average age was （8.63±5.66） days. There were 681 baby boys and 678 baby girls. The maternal age was 22 - 36 years, the average age was （28.65±4.33） years, and the average pregnancy times was （1.03±0.68）. Jaundice occurred in 396 of 1 359 newborns （29.14%）, Among them, there were 246 cases of physiologic jaundice, the incidence rate was 18.10%; 150 cases of pathological jaundice, the incidence rate was 11.04%. Multivariate Logistic regression analysis showed thatpremature delivery （OR=2.368）, pneumonia （OR=1.972）, hemolysis （OR=2.368）, G-6PD deficiency （OR=3.425）, hypoalbuminemia （OR=5.217）, thetime of the third stage of labor ≥ 25 min （OR=2.818） and during pregnancy with comorbidities （OR=2.433） of the newborns wereat higher risk of pathological jaundice. Newborns with the time of the third stage of labor ≥25 min （OR=6.527） wereat higher risk of physiologic jaundice. Conclusion The incidence of neonatal jaundice is relatively high, and pathological jaundice is related to many factors. It is necessary to strengthen the health care of related aspects in the perinatal period and raise the awareness of neonatal family members on jaundice, which will help reduce the occurrence of pathological jaundice.

Objective To investigate the status of cognitive function of elderly residents in Shenghe Community, and to discuss its influencing factors. Methods Investigation of factors related to cognitive disorder, assessment of cognitive function, assessment of sleep disturbance and nutritional status were conducted with permanent residents aged over 60 years in Shenghe Community of Zhengzhou City. Descriptive epidemiological analysis method was used to analyze, and single and multiple factor analysis methods were used to analyze the factors affecting the occurrence of cognitive disorder in elderly residents. Results A total of 1 050 residents aged over 60 years in Shenghe Community of Zhengzhou City were surveyed. The survey subjects were 60-87 years old, and the ratio of male to female was 1.27∶1. The marital status was mainly married, accounting for 54.5%, and the education level was mainly technical secondary school or below, accounting for 62.4%. A total of 138 elderly residents with cognitive disorder, the incidence rate was 13.1%. Multivariate Logistic regression analysis showed that living alone （OR=1.726）, sleep disturbance （OR=1.937）, and more than 4 kinds of comorbidities （OR=1.946） were risk factors for cognitive disorder in residents aged over 60 years of Shenghe Community. Regular physical exercise （OR=0.599） and participation in social activities （OR=0.434） were its protective factors. Conclusion The incidence of cognitive disorder in the elderly in Shenghe Community is relatively high, living alone, sleep disturbance, and more than 4 kinds of comorbidities are independent risk factors. Community medical staff should pay attention to strengthen the early screening of cognitive function, identify as early as possible and develop personalized nursing intervention programs.

Objective To analyze the epidemiological characteristics and pathogen distribution of community-acquired pneumonia in children in Zhuozhou City, Hebei Province, and provide reference materials for the prevention and treatment of community-acquired pneumonia in children in this area. Methods The cases of children with community-acquired pneumonia admitted to a hospital in Zhuozhou from July 2018 to June 2020 were collected as the research object. The basic data of the children were collected and pathogenic bacteria were detected to analyze the drug resistance of common bacteria. Results A total of 829 cases of children’s community-acquired pneumonia in Zhuozhou City were analyzed. The male-to-female ratio in the cases was 1.03∶1. Infants, preschool and school-age children accounted for 48.9%, 35.8% and 15.3%, respectively, and the main seasons were autumn and winter, accounting for 27.9% and 36.4%, respectively. 523 cases of pathogenic bacteria were detected positive, and the detection rate was 63.1%. The detection rate of pathogenic bacteria in community-acquired pneumonia cases of children between different ages and different seasons was statistically significant （P<0.05 or P<0.01）. Among them, the detection rate of pathogenic bacteria in infants and autumn and winter was higher. Three hundred and twenty-six strains of sputum culture bacteria were detected, of which 228 strains were Gram-negative bacteria （69.9%）, mainly Escherichia coli; 98 strains of Gram-positive bacteria （30.1%）, mainly Streptococcus pneumoniae. Serum antibodies were detected in 53 cases of Mycoplasma with a positive rate of 6.4%, and 64 cases with Chlamydia were positive with a positive rate of 7.7%. Throat swabs detected 49 cases of respiratory syncytial virus infection, with a positive rate of 5.9%, and 31 cases of influenza virus with a positive rate of 3.7%. The main Gram-negative bacteria Escherichia coli and Klebsiella pneumoniae had the highest resistance rates to ampicillin （59.5%） and cefazolin （50.6%）, and were sensitive to imipenem, cefepime, etc.; The main Gram-positive bacteria Streptococcus pneumoniae and Staphylococcus aureus had the highest resistance rates to penicillin （97.2%, 85.2%） and erythromycin （86.1%, 70.4%）, and were sensitive to vancomycin and amikacin. Conclusion Children’s community-acquired pneumonia in Zhuozhou City, Hebei Province has a high incidence of infants and young children, and a high detection rate of pathogens, antibacterial drugs should be selected reasonably according to the distribution characteristics of pathogens in children and the results of drug susceptibility tests to improve the treatment effect while preventing and delaying the drug-resistant generation of bacteria.

Objective To analyze the pathogenic characteristics of patients with biliary tract infection and explore their risk factors, so as to provide reference for related prevention and treatment work. Methods 792 patients with biliary tract diseases diagnosed and treated in Jinzhou Central Hospital from November 2019 to October 2020 were selected as the research objects. Bile samples from all patients with biliary tract infection were cultured, identified and drug sensitivity analyzed. The incidence rates of biliary tract infection in patients with different gender, age, body mass index, underlying diseases, types of biliary tract diseases, history of endoscopic retrograde cholangiopancreatography, and history of biliary tract surgery were observed, and the risk factors for biliary tract infection were analyzed. Results A total of 154 patients with biliary tract infection, the incidence of biliary tract infection was 19.4% （154/792）. Co-cultivation and isolation of 179 pathogenic bacteria, mainly Gram-negative bacteria （69.8%）, followed by Gram-positive bacteria （22.3%）, fungi （7.9%）. Escherichia coli （26.3%） and Klebsiella pneumoniae （19.0%） accounted for the higher proportion of Gram-negative bacteria, and Staphylococcus aureus （8.9%） and Staphylococcus epidermis （6.1%） accounted for the higher proportion of Gram-positive bacteria. Among the main Gram-negative bacteria, Escherichia coli had a high resistance rate to piperacillin （83.0%） and ciprofloxacin （70.2%）, and was sensitive to imipenem （0.0%）; Klebsiella pneumoniae had a high resistance rate to piperacillin （79.4%） and ceftazidime （67.6%）, and was sensitive to imipenem （0.0%）. Among the main Gram-positive bacteria, Staphylococcus aureus had high resistance rate to penicillin （75.0%） and erythromycin （62.5%）, and was sensitive to vancomycin （0.0%）; Staphylococcus epidermidis had a high resistance rate to penicillin （81.8%） and ampicillin （63.6%）, and was sensitive to vancomycin （0.0%） and teicolanin （0.0%）. Multivariate Logistic regression analysis showed that the older the age （OR=2.214）, malignant biliary disease （OR=2.373）, the history of endoscopic retrograde cholangiopancreatography （OR=3.979）, and the history of biliary surgery （OR=2.912） were the biliary tract risk factors for infection. Conclusion Patients with biliary tract infections have certain pathogenic characteristics, and the infections are mainly Gram-negative bacteria, effective treatment drugs can be selected according to the results of drug sensitivity tests. Biliary system infection has multiple risk factors such as the patient’s age, malignant biliary disease, history of endoscopic retrograde cholangiopancreatography, and history of biliary surgery, targeted intervention measures should be taken to reduce the incidence of infection.

Objective To evaluate the effect of hand hygiene intervention on kindergartens children in Changping Town, and to provide reference for hand hygiene promotion in kindergartens. Methods In 2019, stratified random sampling method was adopted to select 1 kindergarten with low, medium and high absenteeism rate, respectively, and two rounds of intervention were carried out for the children in the kindergartens. Wilcoxon rank sum test and Chi-square test were used to compare the parents' hand hygiene cognitive behaviors and children's hand hygiene behaviors before and after the first round of intervention, and the children's absence due to infection symptoms before and after the second round of intervention, evaluate intervention effect. Results A total of 338 parents' questionnaires were distributed in the baseline survey, and 328 valid questionnaires were collected after the intervention. There were no significant differences in age, gender and education level of parents before and after the intervention （all P>0.05）. There were 511 children in the baseline survey and 544 children after the intervention. There were no significant differences in gender and household registration before and after the intervention （both P>0.05）. After the first round of intervention, the scores of parents' hand hygiene cognitive behaviors and children's hand hygiene behaviors increased from 2.18 and 2.22 to 2.35 and 2.39, respectively（both P<0.01）. After the second round of intervention, the total absence rate of kindergartens with high absenteeism rate, the absence rate of respiratory symptoms in 3 kindergartens in small and middle classes decreased from 7.09%, 7.58% and 3.01% to 3.01%, 4.38% and 2.23%, respectively（all P<0.01）. Conclusion Intervention measures can promote children to establish good hand hygiene habits, effectively improve children's hand hygiene status and reduce absenteeism due to respiratory diseases.

Objective To investigate the physical and mental health status of clinical nurses during the outbreak of COVID-19, so as to provide evidence for them to reduce physical and mental stress and improve their working status. Methods The physical and mental health status of clinical nurses during the outbreak of COVID-19 was investigated by convenience sampling method and PSTRI psychosomatic relaxation test. The student’s t-test and ANOVA were used to analyze the difference of physical and mental health scores of different populations. Results A total of 346 nurses from 29 grade III general hospitals in Guangdong Province were investigated, with an average age of （27.54 ± 4.75） years. There were 283 females （81.79%） and 184 nurses （53.18%） in emergency department. The average score of PSTRI physical and mental health was （72.30 ± 21.81）, of which 49.13% were PSTRI score ≥71, with an average score of （91.28 ± 13.74）. The PSTRI scores of nurses in different regions, departments, marital status and position titles were statistically significant （P < 0.05）, and the higher scores in different demographic characteristics were Pearl River Delta region （77.10 ± 23.24）, emergency department （77.20 ± 23.13）, unmarried （77.53 ± 21.74）, intermediate title （75.50 ± 23.32） and primary title （70.43 ± 20.49）, respectively. Conclusion The overall physical and mental stress of the clinical nurses during the outbreak of COVID-19 is high, and the physical and mental health status of nurses with different characteristics were different. Hospitals should pay attention to the physical and mental health of clinical frontline nurses, rationally allocate human resources, reduce work load and promote physical and mental health.

Objective To investigate the public's use and relevant knowledge about masks and basic protection awareness during the outbreak of Corona Virus Disease 2019（COVID-19）, and provide evidence for health education in the future. Methods An online survey was conducted through releasing a self-designed questionnaire on the official account of Guangdong Provincial Center for Disease Control and Prevention. Basic information of the respondents, use of masks and prevention measures were collected. Descriptive methods were used to analyze the use of masks of public, and then Logistic regression was used to analyze the factors influencing the protection awareness against the COVID-19. Results A total of 2 213 valid questionnaires were collected. 97.0% of the respondents wore masks during the epidemic, 96.5% used masks in public places, 89.8% used disposable medical or surgical masks, and 94.5% changed their masks once in 1-3 days. 80.6% of the respondents agreed that face masks were effective. 58.5% of respondents showed a strong awareness of protection, with women （OR=1.792） and those aged 60 and over （OR=4.245） more likely to have a strong sense of protection. Conclusion The public has a high protection awareness during the COVID-19, gender and age are the factors influencing the protection awareness.

Objective To investigate and analyze a family clustering of COVID-19 in ZH City, Guangdong Province, with a view to providing more evidence for the scientific prevention and control of COVID-19. Methods Field epidemiological method was used to survey the cases and related close contacts. Real time-PCR technique was used to detect SARS-CoV-2 nucleic acid in throat swab samples collected from the respondents. Results After the onset of the first case on January 28, 6 confirmed cases had occurred in this family, and the epidemic had affected 4 small families with a total of 7 cases. The main symptoms were respiratory symptoms, including 1 critical case,1 severe case, and 5 common cases. The median age of 7 cases was 63 years （36-67 years）; 3 were males and 4 were females. The median exposure-onset interval was 8 d （7-14 d）. Conclusion The early transmission of COVID-19 is prone to family aggregation, and the centralized isolation of single people and single room in the early stage of the epidemic can effectively cut off the transmission route within the family.

Objective To explore the application and effectiveness of the agenda-setting theory of mass communication in emergency response for COVID-19. Methods The main contents of agenda-setting in media emergency response for COVID-19 were accordingly identified. The numbers of interview and media, the amount of news published were adopted to evaluate the effect of traditional media. The overall communication results of new media including WeChat and Weibo （a SINA Microblog service） were evaluated by using numbers of views and readers. The average views per news, average number of readers per news and rereading rate were further calculated to evaluate the agenda-wise effectiveness in releasing the activity tracks of confirmed cases. The epidemic service platform was evaluated based on the number of visits and visitors. An epidemic curve of COVID-19 in Shenzhen was used to explore the relationship between agenda-setting and epidemic trend. Results In the stage of ministerial, during the period from December 25,2019 to March 19,2020,municipal and provincial responses for COVID-19 control and prevention, the media response agenda was set at a proper time, facilitating voluntary communications between media and the public. In terms of traditional media, of the 806 reports published on COVID-19, 340 were on TV, 314 through the radio, and 152 in the newspaper. It can be observed that TV and radio were the most significant in communication. In terms of new media, despite the fact that the number of published articles on WeChat（343 articles） was less than that on Weibo （926 articles）, the views of WeChat（50.726 million） was much higher than those of Weibo （5.165 million）; WeChat articles intended to reveal the activity tracks of confirmed cases had the highest average views per article（706 thousand views） and average readers per article（539 thousand）。 With respect to the views of epidemic service platforms based on WeChat, epidemic query（279 thousand times） and epidemic information（220 thousand times） were top-ranked. Conclusion The COVID-19 media emergency response based on the agenda-setting theory is beneficial for fostering voluntary communication between media and the public. The new media, especially WeChat, has the most compelling impact to the public. Because of the biggest demand on the epidemic information for the public, more precise message about confirmed cases released has improved the emergency response towards COVID-19 in the whole society。

Objective To understand the public protection awareness and behavior of COVID-19. Methods The self-designed questionnaire was used to investigate the population aged 15 and above who came, returned or lived in Jiangsu Province from February 15 to February 22, 2020 via the method of convenient sampling. Descriptive epidemiological analysis was conducted on the protection status of COVID-19, and the influencing factors of the total score were analyzed by univariate and multivariate analysis. Results A total of 27 410 participants were included in the protection survey. Among the respondents, men accounted for 59.50%, with the most people aged 31-40 years （38.83%）, and 67.19% of them had a total protection score above 90 points. Multivariate logistic regression analysis showed that women （OR=1.201）, those aged 21-30 years, 31-40 years, 41-50 years （OR=1.302, 1.649, 1.375）, those with an educational level of “high school or secondary specialized school”, “college degree or above” （OR=1.494, 2.526）, those with occupations of “government agency and institution, medical practitioners, enterprises, and students” （OR=1.475, 2.252, 1.205, 1.442）, and those living in urban areas （OR=1.152） were more inclined to get a total protection score above 90 points （P<0.05）; while those aged 15-20 years （OR=0.573） were less inclined to get that scores （P<0.05）. Conclusion A relatively high proportion of respondents have mastered the protection knowledge and skills of COVID-19. However, the results indicate that it is necessary to strengthen the publicity and education of daily protection knowledge of COVID-19, enhance daily protection awareness, and improve public health literacy, especially men, individuals under 20 and over 51 years old, individuals with low educational levels, individuals engaged in business/service industry, and individuals living in rural areas.