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Covid Booster Vaccines Important to Stop Infection, Study Finds in English
Scientists have urged eligible people to receive Covid booster shots after a major survey in England found evidence of “breakthrough infections” more than three months after full vaccination.
Researchers from Imperial College London analyzed more than 100,000 swabs from a random sample of the population and found that Covid infection rates were three to four times higher among unvaccinated people than among those who had received two injections.
But while full vaccination substantially reduced infection rates, from 1.76% in the unvaccinated to 0.35% in the three months after the second dose, infection rates rose again to 0.55% among three and six months after the second injection.
The finding suggests that protection against infection, with or without symptoms, begins to wane several months after full vaccination, although other studies show that the vaccine’s protection against hospitalization and death is much stronger.
“The potential increase in breakthrough infections over time reinforces the need for a booster program,” said Paul Elliott, director of the React study and professor of epidemiology and public health medicine at Imperial. “It is an incentive for people to receive their booster dose when it is available to them,” added Professor Christl Donnelly, a statistical epidemiologist on the study. The results came as new Covid cases in the UK rose to 42,776, the highest on record since the end of July.
Read more about Scientific Editor Ian Sample’s report here: Covid Booster Injections Are Important To Stop Infection, According To Study In English
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