Coronavirus investigators one step closer to solving mystery of 'patient zero'

Coronavirus investigators one step closer to solving mystery of 'patient zero' 



Investigators looking into the COVID-19 mystery could be one step closer to unmasking "patient zero." A seafood merchant in Wuhan, China, is believed to be the first person diagnosed as having the coronavirus who can be linked back to a wet market in China, leaked documents allege. 

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