10 key phrases in China's fight against COVID-19
Dynamic monitoring
China promoted an epidemic control and prevention strategy with tailored measures for different areas, and all county-level areas were categorized as low-risk, medium-risk or high-risk based on their population and degree of epidemic prevalence.
Health QR codes, which serve as permits for holders to make trips, were used to precisely collect data on epidemic control. The codes come in three colors: A green code means little chance of infection, while holders of yellow and red codes must be put under quarantine for a few days and report health information daily before they are cleared for travel again.
In addition, epidemiological teams were set up to trace and cut off transmission channels. Big data technology and digitalized systems were used to improve precision and efficiency of epidemiological investigations. Tracing those who had close contact with confirmed patients was key to ensure all cases were detected as early as possible.
