September 28, 2022
Vaccines may lessen long COVID for some, but more study is needed

Vaccination after infection with SARS-CoV-2, the virus responsible for COVID-19, is associated with a decrease in the likelihood of long COVID symptoms, finds a large study of U.K. adults published today by the BMJ .

They stress that causality cannot be inferred from this observational evidence, but say vaccination “may contribute to a reduction in the population health burden of long COVID, at least in the first few months after vaccination.”

Vaccines against COVID-19 are effective at reducing rates of coronavirus infection, transmission, hospital admission, and death. Evidence also suggests that long COVID is reduced in those who are infected after vaccination, but the effectiveness of vaccination on pre-existing long COVID is less clear.

The latest survey by the U.K.’s Office for National Statistics (ONS) shows that 44% of people who report long COVID have had symptoms for at least one year, two thirds of whom report symptoms severe enough to limit their day-to-day activities.

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