Booster Effectiveness Wanes After 4 Months, Study Shows
Feb. 14, 2022 Booster shots of the Pfizer/BioNTech and Moderna COVID-19 vaccines lost some effectiveness after four months but still did a good job of keeping people out of the hospital during the Omicron surge, a study shows. During the time when the Omicron variant dominated, the vaccines provided 87% effectiveness against emergency room visits … Read more