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Vaccinated people who become ill are less likely to develop Long Covid syndrome compared to unvaccinated people, an analysis by the UK Health Protection Agency shows.
LSE Health Policy Professor Elias Mosialos, in a paper, explains the study, following concern about Long Covid syndrome.
In detail, Mosialos says:
With the advent of highly contagious variants of coronavirus, from which some vaccinees have been infected or even hospitalised for some time, there is widespread concern about the so-called long-term COVID syndrome.
An analysis by the UK Health Security Agency (UKHSA) examined the emerging evidence on the long-term effects of coronavirus disease as it arises after disease or after vaccination. The review included 15 UK and international studies conducted up to January 2022. The data also show that people who have had one or more doses of the coronavirus vaccine and become ill after vaccination are less likely to develop the long-term COVID syndrome than those who remain unvaccinated and become ill. In addition, those who were vaccinated were less likely to experience symptoms for a shorter period of time, compared to those who were not vaccinated.
I will refer to some of the evidence presented in the study
A. Regarding those who caught it after vaccination
1. 8 of the 15 studies looked at the effect of vaccinations before infection. Most of these studies showed that those vaccinated (with 1 or 2 doses) were less likely to develop long-term symptoms compared with unvaccinated people, both in the short and long term (4 weeks to 6 months after infection)
2. People who had had 2 doses of Pfizer, AstraZeneca or Moderna vaccines or one dose of Janssen vaccine were about half as likely as people who received 1 dose or were not vaccinated to develop long-term COVID symptoms lasting more than 28 days.
3. Vaccines were more effective against most post-disease symptoms in people aged 60 years and older, and less effective for younger people (19 to 35 years)
B. Regarding those who caught it before vaccination
1. 4 of 15 studies compared long-term COVID symptoms before and after vaccination
2. Another 3 studies in unvaccinated individuals who contracted and developed long-term COVID compared symptoms in those who were either vaccinated or remained unvaccinated after contracting the disease. Those who were vaccinated were less likely to report long-term COVID symptoms after vaccination than those who remained unvaccinated during the same period.
3. People with COVID-19 who were vaccinated earlier after diagnosis were much less likely to report long-term COVID symptoms than people who were vaccinated later after diagnosis.
We know that for most people, symptoms of the disease caused by coronavirus are short-lived and resolve. But we also know that for some, symptoms can be more severe and they may be hospitalized in critical condition. But for some, the disease can also eventually become a barrier to their daily lives with long-lasting symptoms.
I will close by adding that in the UK it is estimated that 2% of the population has reported symptoms, which can last for more than 4 weeks after initial infection. The 3 most common symptoms are fatigue, breathlessness and muscle or joint pain. If an infected person experiences these or other unusual symptoms, particularly for more than 4 weeks after infection, they should consider contacting their doctor.
Source: protothema.gr
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