Coronavirus: Israel Finds 4th Vaccine Dose Not As Effective Against Omicron The second booster with Pfizer or Moderna raises antibodies but not enough to protect against the Omicron Covid-19 variant. Zenger · Feb 11, 2022
Israeli Study Shows 4th Shot of COVID-19 Vaccine Less Effective on Omicron A fourth shot of COVID-19 vaccine boosts antibodies to even higher levels than the third jab but it is not enough to prevent Omicron infections, according to a preliminary study in Israel. Israel's Sheba Medical Center has given second booster shots in a trial among its staff and is studying… Asharq Al-Awsat · Jan 17, 2022