Objective To analyze the epidemiological characteristics of coronavirus disease 2019 (COVID-19) cases in Guizhou, and provide evidence for the prevention and control of COVID-19.
Methods The data of COVID-19 cases reported in Guizhou in 2020 were collected for a descriptive epidemiological analysis.
Results From January 22 to December 31, 2020, a total of 173 COVID-19 cases were reported, including 2 deaths (fatality rate: 1.16%), in Guizhou. Among these cases, 147 were confirmed cases (84.97%) and 26 were asymptomatic infection cases (15.03%), 31 were severe cases (21.09%), 84 were local cases (48.55%), 87 were domestic imported cases (50.29%) and 2 were overseas imported cases (1.16%). The epidemic curve presented two incidence peaks with an interval of 7 days. In the first peak period, domestic imported cases were mainly reported, and in the second peak period, local cases were mainly reported. The cases were reported in 44 (50%) districts in 9 (100%) cities, mainly in Guiyang, Bijie and Zunyi, accounting for 70.70% of the total. The men to women ratio of the cases was 1.06∶1. The cases were reported in all age groups, the median of the age of cases was 37 years. There were 82 cases (47.40%) detecting through screening of close contacts, 55 cases (31.79%) through medical visits, and 36 cases (20.81%) through screening of key personnel, such as those traveling from Wuhan. The main exposure factor included close contact (42.77%) and living in Wuhan (38.73%). There were 29 family clusters.
Conclusion The cases of COVID-19 reported in Guizhou were mainly imported cases and secondary cases in close contacts. Early investigation, centralized isolation, and monitoring of fever cases and close contacts in key areas are essential for the early detection of the cases and the prevention of the spread of COVID-19.
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