COVID-19 is most transmissible 2 days before and 3 days after symptoms appear
Each wave of the pandemic has underscored just how gravely contagious COVID-19 is, but there is less clarity among experts
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B.1.1.7 SARS-CoV-2 variant more transmissible but not linked to more severe illness, death
(HealthDay)—The B.1.1.7 variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is not associated with more severe illness or death
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The P.1 lineage of the SARS-CoV-2 variant first observed in Brazil has driven a second wave of infections even in
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