virus88

The B. juara777 1 1 7 lineage was believed to be 30 to 50% more contagious than the original SARS-CoV-2 strain In the U S , in mid-April 2021—before Delta became predominant—Alpha comprised 66% of cases, according to a study released in June by the CDC Severity: Studies have suggested the B 1 1 7 lineage was more likely to land infected people in