Similar upticks over the summer and winter led to major surges in the spread of disease, Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, said at a news briefing on Monday. “But right now I’m scared.” Dr. Walensky added that she felt a sense of “impending doom.”Scientists have debated whether vaccinated people may still get asymptomatic infections and transmit the virus to others. The new study, by researchers at the C.D.C., suggested that since infections were so rare, transmission is likely rare, too. There also has been concern that variants may render the vaccines less effective. Troubling variants were circulating during the time of the study — from December 14, 2020 to March 13, 2021 — yet the vaccines still provided powerful protection.

Source: New York Times March 29, 2021 15:36 UTC