BEIJING - The fast-spreading delta variant of the novel coronavirus has been gaining traction worldwide since it was first detected in India, and now researchers may have an idea of why: Its viral ...
A man wearing a protective face mask walks past an illustration of a virus outside a regional science centre amid the coronavirus disease (COVID-19) outbreak, in Oldham, Britain August 3, 2020.
What sets delta apart, experts say, is how much virus is produced by those who are infected — a measure known as viral load.
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