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Where did COVID come from? Five mysteries that remain

In the wake of the World Health Organization’s investigation, there are still key questions about when, where and how the pandemic began.
  1. Smriti Mallapaty
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Following a month-long fact-finding mission in China, a World Health Organization (WHO) team investigating the origins of the COVID-19 pandemic concluded that the virus probably originated in bats and passed to people through an intermediate animal. But fundamental questions remain about when, where and how SARS-CoV-2 first infected people.

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Nature 591, 188-189 (2021)

doi: https://doi.org/10.1038/d41586-021-00502-4

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