The benefits of China's zero-tolerance approach to Covid-19 continue to outweigh the costs but it should cut back on excessive measures that risk exhausting people, a former Chinese disease control official has said.

Zeng Guang, former chief epidemiologist at Chinese Centre for Disease Control and Prevention, said “flood-like” measures and policies that prove inefficient should be avoided even though China has the financial resources to keep pursuing the goal of zero local infections.

Since late July, China has brought under control clusters of infections driven mainly by the highly transmissible Delta variant of the new coronavirus.

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