Feb. 16, 2022
Vaccination in opposition to COVID-19 reduces the danger of creating lengthy COVID and improves lengthy COVID signs amongst those that had been unvaccinated when contaminated, in line with a brand new complete overview by the U.Ok. Well being Safety Company.
The overview consists of information from 15 U.Ok. and worldwide research, with seven research analyzing whether or not COVID-19 vaccination earlier than an infection protects in opposition to creating lengthy COVID and 7 research wanting on the impression of vaccination amongst individuals who already had lengthy COVID. One examine examined each.
In six research, those that obtained one or two vaccine doses earlier than coronavirus an infection had been much less more likely to develop signs of lengthy COVID after an infection.
In two research, absolutely vaccinated individuals had been much less doubtless than unvaccinated individuals to develop medium- or long-term signs similar to fatigue, headache, weak spot within the legs and arms, persistent muscle ache, hair loss, dizziness, shortness of breath, lack of odor or lung scarring.
As well as, three research evaluating lengthy COVID signs earlier than and after vaccination discovered that most individuals reported an enchancment in signs after vaccination, both instantly or over a number of weeks. Just a few circumstances reported a worsening in signs after vaccination.
“There may be additionally proof that unvaccinated individuals with lengthy COVID who had been subsequently vaccinated had, on common, decreased lengthy COVID signs, or fewer lengthy COVID signs than those that remained unvaccinated,” the overview stated.
Scientists aren’t but positive why vaccination results in an enchancment in signs for some individuals, in line with The Guardian. Extra analysis is being performed.
“The time period ‘lengthy COVID’ covers a variety of post-COVID circumstances and so we don’t but absolutely perceive all of the processes concerned,” Deborah Dunn-Walters, chair of the British Society for Immunology’s COVID-19 Taskforce, advised the Science Media Centre.
“The immune system is believed to play a job in symptom improvement in a major variety of circumstances, doubtless because of an overreactive and/or barely misdirected immune response in the course of the acute COVID an infection,” she stated.
