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Risk of covid-19 infection plummets 21 days after vaccination

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People vaccinated with coronavirus vaccine at vaccination center in Hello, UK

Henry Nichols / Reuters

Chance to get COVID-19 New analysis suggests a sharp decline 21 days after the first dose after vaccination.

People who become infected after vaccination test positive for the virus and are less likely to have symptoms than those who are not jabed.

The findings, published by the Office for National Statistics (ONS), are based on a sample of adults vaccinated with the coronavirus vaccine by May 31.

They suggest that the risk of infection first increases after the first dose and peaks in about 16 days.

The risk then decreases significantly from the first dose until about 1 month later, after which the risk decreases slowly but steadily.

However, the infection rate after vaccination can be very low.

Of the 297,493 vaccinated samples, 0.5% were subsequently found to be a new infection with covid-19.

Among the recipients Pfizer / BioNTech Vaccine, 0.8% were later infected, Oxford / AstraZeneca Vaccine..

From a sample of 210,918 adults vaccinated with both vaccines, only 0.1% were subsequently found to be new infections.

According to ONS, some of the covid-19 positive tests in recently vaccinated people may have been caused by unknowing infection or exposure at a vaccination center just before vaccination with the jab. there is.

The analysis is caused by younger and less vaccinated age groups, as individual numbers suggest an exponential increase in cases of covid-19 throughout the United Kingdom.

Results of about 110,000 cotton swab tests Covid-19 infections across the UK between May 20 and June 7 have doubled every 11 days, affecting approximately 1 in 670 people. The highest prevalence is in northwestern England.

“Prevalence is increasing exponentially, which is driven by younger age,” said the study’s authors. Stephen Riley At Imperial College London.

“Obviously that’s bad news … but the important thing to point out here is that we are in a very different part of the epidemic in the UK and it is very difficult to predict the duration of the exponential stage. is.”

Co-author Paul ElliottAlso at Imperial, he said: “If you look at the details, I think you can get a lot of relief from the fact that the elderly, who have virtually everyone, seem to have very good protection. Double vaccination. And In the younger group under the age of 65, the rate of vaccination or double vaccination is much lower, and most infections occur in the unvaccinated group. “

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Risk of covid-19 infection plummets 21 days after vaccination

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