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Epidemic Characteristics of COVID-19 in Four Chinese Cities

Jianguo Hu1, Shenhong Rao1, Xiaojing Hu1

  • 1School of Nursing, Anhui Sanlian University, China.

Japanese Journal of Infectious Diseases
|June 2, 2020
PubMed

Insights

The initial spread of coronavirus disease 2019 (COVID-19) outside Wuhan was primarily due to infected individuals traveling from the city. Controlling travel and community contact is key to reducing local COVID-19 cases.

Area of Science:

  • Epidemiology
  • Infectious Diseases
  • Public Health

Background:

  • The COVID-19 outbreak began in Wuhan, China, in December 2019.
  • The virus rapidly spread, leading to a significant number of cases nationwide.
  • Understanding early transmission patterns is crucial for containment.

Purpose of the Study:

  • To describe the epidemiologic characteristics of COVID-19 patients in four Chinese cities outside Wuhan.
  • To identify the primary sources and modes of SARS-CoV-2 transmission in the early stages.
  • To inform public health strategies for controlling the spread of the virus.

Main Methods:

  • Data collection from 950 COVID-19 patients across Hefei, Hangzhou, Wenzhou, and Shenzhen as of February 6, 2020.
  • Analysis of patient demographics, including age and sex.
  • Investigation of exposure history, focusing on contact with Wuhan residents and SARS-CoV-2 infection sources.

Main Results:

  • The study included 950 patients (50.21% male, 49.79% female) with a mean age of 45.64 ±15.59 years.
  • 31.47% of patients reported contact with Wuhan residents or diagnosed COVID-19 cases.
  • 14.53% had SARS-CoV-2 infection from an unknown source, indicating local transmission.
  • The majority of COVID-19 cases in these cities originated from Wuhan, with subsequent local spread.

Conclusions:

  • Initial SARS-CoV-2 transmission in cities outside Wuhan was mainly driven by imported cases.
  • Implementing measures to block imported infections and control community transmission is vital.
  • These strategies can effectively reduce the local incidence of COVID-19.

Keywords:
COVID-19ChinaSARS-CoV-2pneumonia

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