COVID-19 booster shot significantly boosts efficacy - study

 https://www.jpost.com/health-and-wellness/coronavirus/article-706267

The third COVID-19 Pfizer-BioNTech vaccine significantly boosts effectiveness against infection, a study published on Monday by a group of Israeli researchers from Sheba Medical Center and Tel Aviv University found.

The peer-reviewed study, published in the scientific journal Nature Immunology, found that the estimated vaccine effectiveness of the third dose against PCR-confirmed infection, regardless of symptoms, stood at 85.6% compared to two doses.