During a broadcast interview, the head of the National Institutes of Allergy and Infectious Diseases said he’s “quite concerned” about the Delta variant in the US Washington [US], July 1 (ANI): The highly contagious Delta variant of the coronavirus is the greatest threat to the United States’ attempt to eradicate COVID-19, White House chief medical adviser Anthony Fauci said on Wednesday. During a broadcast interview, the head of the National Institutes of Allergy and Infectious Diseases said he’s “quite concerned” about the Delta variant in the US. Dr Fauci told US media that the delta variant can spread “much more efficiently” and “cause more severe disease”. “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. Fauci further said that the good news is that COVID-19 vaccines have shown to be very ef...