The new study was published after the University of Zurich (Switzerland) and other research institutes examined 1,106 unvaccinated adults with a median age of 50 who were confirmed to have Covid-19 between August 6, 2020 and January 19, 2021. There were also 628 adults (median age 65) randomly selected from the general population who did not have Covid-19.
The study found that 17% of participants did not regain normal health and 18% reported symptoms related to Covid-19 within 24 months of their initial Covid-19 infection, according to PTI News Agency. The study was published in The British Medical Journal .
New study finds 23% of unvaccinated Covid-19 participants did not recover, dropping to 19% after 12 months and 17% after 24 months of Covid-19
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Overall, 55% of participants said they returned to normal health within less than a month of contracting Covid-19, while 18% said they recovered within 1-3 months.
After six months, the study found that 23% of participants had not recovered, falling to 19% after 12 months and 17% after 24 months. Compared to those who were not infected, those who had Covid-19 were found to have a higher risk of both physical and mental health problems. For example, they reported changes in taste or smell (9.8%), malaise after exertion (9.4%), decreased ability to concentrate (8.3%) and anxiety (4%) at six months after contracting Covid-19.
Researchers looked at patterns of recovery and symptom persistence over two years in adults from a University of Zurich study of people with confirmed Covid-19 infection.
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Participants provided information about 23 potential Covid-19 symptoms at 6, 12, 18 and 24 months after infection. The study also took into account other potentially influential factors including age, gender, education , employment and pre-existing health problems.
The researchers acknowledged that the findings had some limitations, but said that frequent assessments of a range of health outcomes and similar findings after further analysis strengthened the reliability of the estimates.
“Persistent health problems pose significant challenges for those affected and place a heavy burden on public health and health care services,” the team wrote, calling for clinical trials “to establish effective interventions to reduce the burden of post-Covid-19 conditions.
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