COVID spreads in China

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Hong Kong health expert Professor Malik Peiris relates the lessons from the devastation there earlier this year. UK virologist Dr Tom Peacock reveals the unusual origins and evolution of omicron, and explains the risks of dangerous new variants. New studies from China are revealing further SARS-like viruses in the wild; Professor Eddie Holmes says they underline the risk of further pandemics. (Photo: Kevin Frayer/Getty Images)