Do claims the coronavirus spread to China via frozen food merit serious investigation?

Chinese health officials have called for an investigation into whether Covid-19 could have arrived in the country via frozen food, a theory that has prompted widespread international scepticism as Beijing faces mounting pressure to do more to help find the origins of the pandemic.Beijing recently rejected a World Health Organization plan for further investigations, which included exploring the theory that the virus could have escaped from a laboratory in Wuhan that was studying bat…

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