CDC COVID-19 Response Team and colleagues

Mark Thompson of the CDC COVID-19 Response Team and colleagues also demonstrated that the vaccines were highly efficient at lowering the viral load, febrile symptoms, and the duration of illness in people who acquired breakthrough infections despite being vaccinated.

One week after obtaining a federal green light from Pfizer and BioNTech’s COVID-19 vaccine

On Friday, only one week after obtaining a federal green light from Pfizer and BioNTech’s COVID-19 vaccine, the Food and Drug Administration officially approved a second emergency vaccine—this one produced by Moderna.