China’s zero-tolerance approach helped control Covid-19, but is it time for an exit strategy?

This is the third in a series about China’s plans to reopen its borders to the world amid the Covid-19 pandemic. Here, Josephine Ma explores whether China’s zero-tolerance prevention and control strategy can hold.

Within days of about 100 new Covid-19 cases being discovered in Guangdong, most cities in the southern Chinese province had tested their entire populations, some more than once.