Dr Fauci: 'Quite concerned' over Delta Covid-19 variant in US
"The Delta variant has the capability of spreading much more efficiently from person to person. It also can cause more severe disease. So there are two things about it that are troublesome," said the top US Covid-19 expert.
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"The Delta variant has the capability of spreading much more efficiently from person to person. It also can cause more severe disease. So there are two things about it that are troublesome," said the top US Covid-19 expert. 
