The Swedish Public Health Authority conducts several investigations to find out the presence of COVID-19 in Sweden. The results of the first survey at national level , with a total of 2 573 participants, are now clear. They show that an estimated 0.9 percent of the population had an ongoing infection with COVID-19 when the samples were collected during the period April 21-24.
The results of the 679 participants in the Stockholm-based survey showed that a total of 2.3 percent of the population there had an active infection with COVID-19 during April 21-24. This is roughly the same proportion as in a previous survey carried out at the end of March – April .
Those who participated in the survey took samples on themselves, or on their child if they were custodians of an invited child. Samples were taken from the pharynx and nasal cavity and the participants also submitted saliva samples. The samples were then analyzed in the laboratory to see if the samples contained SARS-CoV-2, which is the virus that causes COVID-19.
The results of the survey will be used, among other things, as a basis for the models of the spread of infection that the Public Health Agency does.
The Public Health Authority conducts investigations into the prevalence of COVID-19 infection with support from the Swedish Armed Forces.
The more detailed results will be presented within the next few days, as well as results from the questionnaire on symptoms that the participants had to answer.
To date, Sweden has reported nearly 28,000 cases, including nearly 3500 deaths.