Epidemiologic Characteristics of COVID-19 in Guizhou Province, China

  • Kaike Ping Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Mingyu Lei Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Yun Gou Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Zhongfa Tao Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Guanghai Yao Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Can Hu Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Qin Tao Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Zhiting Zou Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Dingming Wang Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Shijun Li Guizhou Center for Disease Control and Prevention, Guizhou, China
  • Yan Huang Guizhou Center for Disease Control and Prevention, Guizhou, China
Keywords: SARS-Associated Coronavirus, Incubation Period, Infectious Disease, Asymptomatic Infections

Abstract

Introduction: At the end of 2019, the COVID-19 broke out, and spread to Guizhou province in January of 2020.

Methodology: To acquire the epidemiologic characteristics of COVID-19 in Guizhou province, we collected data from 169 laboratory-confirmed COVID-19 related cases. We described the demographic characteristics of the cases and estimated the incubation period, serial interval and the effective reproduction number. We also presented two representative case studies in Guizhou province: Case Study 1 was an example of the asymptomatic carrier; while Case Study 2 was an example of a large and complex infection chain that involved four different regions, spanning three provinces and eight families.

Results: Two peaks in the incidence distribution associated with COVID-19 in Guizhou province were related to the 6.04 days (95% CI: 5.00 – 7.10) of incubation period and 6.14±2.21 days of serial interval. We also discussed the effectiveness of the control measures based on the instantaneous effective reproduction number that was a constantly declining curve.

Conclusions: As of February 2, 2020, the estimated effective reproduction number was below 1, and no new cases were reported since February 26. These showed that Guizhou Province had achieved significant progress in preventing the spread of the epidemic. The medical isolation of close contacts was consequential. Meanwhile, the asymptomatic carriers and the super-spreaders must be isolated in time, who would cause a widespread infection.

Published
2021-03-31
How to Cite
1.
Ping K, Lei M, Gou Y, Tao Z, Yao G, Hu C, Tao Q, Zou Z, Wang D, Li S, Huang Y (2021) Epidemiologic Characteristics of COVID-19 in Guizhou Province, China. J Infect Dev Ctries 15:389-397. doi: 10.3855/jidc.12818
Section
Coronavirus Pandemic