Abstract: Objective To analyze the epidemiological characteristics of confirmed cases of COVID-19 in Huizhou City, so as to provide scientific basis for the prevention and control of the epidemic. Methods A retrospective study was conducted to collect the data of 62 confirmed cases of COVID-19 who were admitted to Huizhou Central People's Hospital from January 19 to May 31, 2020, and the epidemiological characteristics, results of COVID-19 nucleic acid testing and hospitalization related conditions were analyzed. Results The onset of confirmed cases in Huizhou was concentrated on January 20 to February 18, 2020. The distribution of confirmed cases was 29 in Huidong County ,17 in Huicheng District, 11 in Huiyang District and 5 in Boluo County. There were 22 cases of mild type, 37 cases of common type and 3 cases of severe type, no critical severe cases. Among those cases, male to female ratio was 1∶1, aged 1-85 years old, the median of age was 46 （36, 60） years. Fifty-five cases （88.71%） had the history of travel or residence in Hubei Province, 3 cases （4.84%） had no clear contact history. No local cases were found, and most of cases were imported from Hubei Province （55 cases）, mainly were family clustering cases （45 cases）. The hospitalization days in severe cases were longer than those in mild and common cases （P<0.05）; there were no significant differences in onset ages and the first negative days of COVID-19 nucleic acid testing between the clinical classification （P>0.05）. Nine cases （14.52%） were re-positive within 6-15 days after discharge. The second time of nucleic acid conversion was shorter than that of the first time （P<0.05）. Conclusion The COVID-19 cases in Huizhou City are mainly imported from Hubei Province and clustered by families, mainly distribute in Huidong County. Cases are mainly mild and common types, the hospitalization days were related to the severity of illness.

Key words: COVID-19, Epidemiological characteristic, Nucleic acid testing, Re-positive phenomenon