https://www.eurekalert.org/news-releases/933075
News Release 28-Oct-2021
Peer-Reviewed Publication
The Lancet
People who have received two vaccine doses against COVID-19 have a lower, but still appreciable, risk of becoming infected with the delta variant compared with unvaccinated people. Vaccinated people clear the infection more quickly, but the peak viral load among vaccinated people is similar to that seen in unvaccinated people, which may explain why they can still readily pass on the virus in household settings, according to a study published in The Lancet Infectious Diseases.
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Professor Ajit Lalvani of Imperial College London, UK, who co-led the study, said: “Vaccines are critical to controlling the pandemic, as we know they are very effective at preventing serious illness and death from COVID-19. However, our findings show that vaccination alone is not enough to prevent people from being infected with the delta variant and spreading it in household settings. The ongoing transmission we are seeing between vaccinated people makes it essential for unvaccinated people to get vaccinated to protect themselves from acquiring infection and severe COVID-19, especially as more people will be spending time inside in close proximity during the winter months. We found that susceptibility to infection increased already within a few months after the second vaccine dose—so those eligible for COVID-19 booster shots should get them promptly.”
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