Since the emergence of COVID-19, a question has obsessed many: Where did it come from?
virus almost-certainly jumped from wildlife into humans
Professor Dominic Dwyer, director of public health pathology in NSW and a member of the World Health Organisation team that travelled to Wuhan last year to investigate the origins of the virus, agrees.“That’s what we thought originally back when we did the first report. This is yet another brick added to the wall of information around zoonotic infection.”When COVID-19 first emerged in Wuhan, two distinct viral lineages were spotted, separated by two small changes in genetic code.
If the COVID-19 virus originated in a lab, as some conspiracy theories suggest, you’d expect a single introduction into humans – rather than two distinct viral lineages. And both strains were found in samples taken from Huanan market. “That, I think, is pretty good evidence,” says Dwyer.Our story now moves to the Huanan Seafood Wholesale Market; two-thirds of early hospitalised cases had a link to the market.
“It’s like going to Coles in Bendigo on a wet Wednesday afternoon. It’s not a thriving mass of humanity,” says Holmes. This map shows the west side of the market. Each black dot represents a human case. Triangles mark stalls selling live animals or unknown meat.
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