ACCORDING to a study by Pfizer, the vaccine from the US and German Biontech loses its effectiveness within six months: it drops from 96% to 84% according to the data published in the preprint not yet peer-reviewed. Stat News reports that according to an ongoing Pfizer study of more than 44,000 people, the vaccine‘s effectiveness in preventing any Covid-19 infection that causes even minor symptoms appeared to decrease by an average of 6% every two months thereafter. the administration.
The Moderna vaccine is 90% effective against symptomatic Covid-19 and 95% effective against severe disease after six months, the company said in April, but Johnson & Johnson did not disclose the six-month efficacy data. reports Stat News.
Third dose Covid vaccine, Viola: “At the moment there is no evidence that it is needed”
by Giuliano Aluffi
Pfizer’s study, which enrolled volunteers in Europe and the Americas, does not consider whether the vaccine is less effective against the Delta variant. The pharmaceutical company’s head of research and development said he expects the third dose to be “a little longer lasting” than the second dose.
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