The booster vaccine against the omikron variant of the coronavirus loses strength after three months. The chance of hospitalization has increased from 15 to 45 percent compared to the period before a third dose was available. This is the conclusion of a new study published in the journal ‘The Lancet Respiratory Medicine’.
“Pfizer/Biontech booster vaccinations against Covid-19 significantly improve protection against omikron, but after three months, protection from hospital admissions appears to have diminished,” said Sara Y. Tartof, U.S. epidemiologist of the Kaiser Permanente Health Consortium. She is the lead author of the study. There will be an increased resistance to the virus, it is emphasized.
The study analyzed 11,123 hospital admissions and emergency room visits that did not result in hospitalizations from December 2021 to February 2022. Both the delta and omikron variants of the virus were in circulation at the time.
The study, funded by Pfizer, shows that three doses initially reduced hospital admissions by 85 percent. However, after three months, that percentage drops to 55 percent. A similar decrease in efficacy occurs in the delta variant.
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