The findings are published on a pre-print online server called medRxiv and have not been peer-reviewed.ĭr. Fallon/AFP/Getty ImagesĪ small study of elderly people finds that delaying a second dose of the Pfizer coronavirus vaccine for three months produces an even stronger antibody response than giving it on the recommended schedule of three weeks after the first dose.īut it’s not clear whether that translates into stronger protection in real life – and the delayed vaccination schedule resulted in lower levels of immune system cells that are involved in long-term protection from disease, the researchers in Britain reported. Vials of the Pfizer Covid-19 vaccine are seen at a mobile vaccination clinic at the Weingart East Los Angeles YMCA on May 14 in Los Angeles.
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