March 1, 2022 — You may have already seen the headline: The Pfizer vaccine’s effectiveness against COVID-19 infection drops to 12% in 5- to 11-year-olds. But how do experts interpret this and other results from this preprint study? Despite the findings, which have not been peer-reviewed, researchers at the New York State Department of Health, … Read more
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
July 28, 2021 – Pfizer’s COVID-19 vaccine continues to show strong protection against serious illness and hospitalization after 6 months, but overall protection against the virus appears to wane after a half a year, according to a new study. The July 28, 2021, pre-print report of the study, which has not been peer-reviewed, suggests … Read more