CNBCPreliminary study in Israel shows fourth Covid vaccine shots are less effective against omicronJan 17, 2022more_vert
Financial TimesFourth Pfizer jab ineffective in blocking Omicron, Israeli study showsJan 18, 2022Mehul SrivastavaBy Mehul Srivastavamore_vert
ReutersIsraeli study shows 4th shot of COVID-19 vaccine less effective on OmicronJan 17, 2022Ari RabinovitchBy Ari Rabinovitchmore_vert