People who get a booster Pfizer COVID-19 vaccine or who had their second jab within six months should be highly protected against Omicron, Israeli health chiefs claim. Without citing any data, Health minister Nitzan Horowitz said on Tuesday that there was 'room for optimism' based on 'initial indications'. Just hours later, a report by an Israeli news channel claimed the Pfizer jab was 90 per cent effective at preventing symptomatic ...