In a study, it is discovered that one in ten people experience at least one moderate to severe symptom that is perceived to have a negative impact on their work, social or personal life.

The study, published in the Journal of the American Medical Association found that the most common long-term symptoms are loss of smell and taste and fatigue.

Researchers at Danderyd Hospital and Karolinska Institutet in Sweden have been conducting the so-called COMMUNITY study since spring last year, with the main purpose of examining immunity after COVID-19.

''We investigated the presence of long-term symptoms after mild COVID-19 in a relatively young and healthy group of working individuals, and we found that the predominant long-term symptoms are loss of smell and taste,'' said Charlotte Thalin, lead researcher for the COMMUNITY study at Danderyd Hospital and Karolinska Institutet.

''Fatigue and respiratory problems are also more common among participants who have had COVID-19 but do not occur to the same extent,'' Thalin said.

In the first phase of the study, blood samples were collected from 2,149 employees at Danderyd Hospital, of whom about 19 percent had antibodies against SARS-CoV-2.

The researchers collected blood samples every four months, and study participants responded to questionnaires regarding long-term symptoms and their impact on the quality of life.

The most common long-term symptoms were loss of smell and taste, fatigue, and respiratory problems, they said.

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