Even a fourth Pfizer jab not enough to stop Omicron infection, says study
But the vaccine raised antibody levels and those infected in the trial had only slight symptoms or none at all
18 January 2022 - 20:12
A fourth dose of the Pfizer-BioNTech vaccine is insufficient to prevent infection with the Omicron variant of Covid-19, according to preliminary data from a trial in Israel released on Monday...
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