Mass testing, health codes, lockdowns: how China’s zero-Covid policy works

In this series, we answer frequently asked questions about China’s zero-tolerance approach to Covid-19, including entry restrictions, the length of quarantine and testing requirements for travellers. Is there a question you want us to tackle? Send us an email at [e-mail].

In China, detection of Covid-19 cases usually triggers mass nucleic acid testing, which could be citywide and repeated until an outbreak wanes.