Nature or lab leak? Why tracing the origin of Covid-19 matters | South China Morning Post

The virus that causes Covid-19 has so far killed more than 3.5 million people worldwide, and in recent weeks, the debate over where it originated has grown ever more heated. Dr Wanda Markotter, head of the Centre for Viral Zoonoses at the University of Pretoria in South Africa, has extensive experience monitoring ba…

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