Table 3.

Prevention and control measures taken by the Chinese government in areas with different levels of risk [12, 32, 33]

Measures	High-risk areas	Medium-risk areas	Low-risk areas
Area traffic control	√
Close public facilities	√
Close business	√
Close primary schools and kindergartens	√
Close colleges and universities	√
Delayed start of school	√	√	√
Gathering activities are prohibited	√	√	Reduce crowd gathering activities
Suspected cases are quarantined	√	√
Close contacts are subject to isolation medical observation	√	√	√
Use a mobile app	√	√	√
Comprehensive screening of fever patients	√	√	Medical institutions strengthen the monitoring, detection and reporting of fever cases
Door to door testing	√	√
Wear masks in public places	√	√	√
Measuring body temperature	√	√	√
Keep social distance	√	√	√
Information registration of outsiders	√	√	√
Check health code, itinerary card	√	√	√
Negative nucleic acid test certificate	√	√	√
Disinfect relevant places	√	√	√