5 things we know and still don’t know about COVID, 5 years after it appeared
By LAURAN NEERGAARD, LAURA UNGAR and MIKE STOBBE
Five years ago, a cluster of people in Wuhan, China, fell sick with a virus never before seen in the world.
The germ didn’t have a name, nor did the illness it would cause. It wound up setting off a pandemic that exposed deep inequities in the global health system and reshaped public opinion about how to control deadly emerging viruses.
The virus is still with us, though humanity has built up immunity through vaccinations and infections.
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