In the latest test shows that 14% of people living in stockholm region has anti bodies against Covid.https://www.dn.se/nyheter/sverige/var-s ... tikroppar/
Every seventh person in Stockholm who has been tested has developed antibodies which can give immunity to covid-19. It shows the results of one of the largest mass tests that have been done and will be presented on Wednesday.
The tests have been conducted between week 18 and week 24 - until June 14 - and include people who are 18 years or older and show whether the person had a covid-19 infection and then developed antibodies. Those who have taken the test were asked to be free of symptoms for the last 14 days before taking it and it is a mixture of people who had symptoms and those who did not notice that they were sick.
- A large group did not have any symptoms but still tested themselves. We have also tested 14,000 people at various companies where there were both infected and healthy. The result is a description of what we have found among the 50,000 people we have sampled, says Henrik Forsberg, CEO of Werlabs, which is responsible for testing.
Tegnell: Everything speaks to being immune
The analyzes show that 14 percent, or one in seven people, of those sampled in Stockholm have developed antibodies. The Public Health Authority has previously said that it was hoped that the level would be 20 percent as early as May, given the spread of viruses.
In Gothenburg, the figure is 11.5 percent and in Malmö 5 percent.
According to state epidemiologist Anders Tegnell, this means that the figures reflect the situation about a month ago:
- It takes a couple of weeks to develop antibodies from getting sick so the figure is actually much higher today. We are working on this and given that we have a doubling time of the number of cases in about ten days, it should be a little over 20 percent. But we have to count on that well, says Tegnell.
According to Anders Tegnell, 14 percent is also a fairly high figure compared to other countries in the world where measurements have been made. In Norway and Finland, the figure is between one and two percent.
- Most other countries are on single-digit numbers. It is pretty good that Sweden has come further in the pandemic. London is also at this level and the British epidemic is quite similar to ours.
Looking at the whole of Sweden, the figures show that more people in the group 18–29 years than those who are older have developed antibodies. There, 14 per cent have been found to have antibodies, while others from 30 years and up are between 9 and 12 per cent.
- The difference may depend on who has chosen to take the test, it is not a scientific selection, says Werlab's CEO Henrik Forsberg.
36,000 of the samples were taken by venous blood samples and 14,000 by capillary blood samples. None of the tests have been quick tests. All samples were taken by trained nurses.
On May 20, the Public Health Authority published the first results of how much of the population in Stockholm carries antibodies. It showed a low 7.3 percent. In Skåne and Västra Götaland, the figures were even lower, 4.2 and 3.7 percent respectively. So these numbers appear to be increasing.
In a week, Werlabs estimates that an additional 20,000 samples have been analyzed.
- 50,000 tested provides a good statistical basis for the whole group and the figures are quite in line with how we see that the incidence has been and they feel reasonable even compared to other studies, says Karin Tegmark Wisell, Head of the Public Health Authority.
- Our figures also differ between Stockholm, Gothenburg and Malmö. The number of iva-cared for is the most stable figure, and Stockholm has the highest and Gothenburg has more than Malmö. The differences that can be seen when it comes to age groups and workplaces can depend, among other things, on the contacts you have in your work, as they are transmitted through contact infections primarily.
However, Karin Tegmark Wisell warns to draw some big conclusions regarding the exact figures for the three big cities. The number of people who took the test differs too much.
37,000 of those who took Werlab's test did so in Stockholm, 10,000 in Gothenburg and 1,500 in Malmö.
- Based on the number of tests carried out in the different regions, the statistical certainty in the specified percentages is higher for Stockholm, than for Gothenburg and lowest for Malmö.
Karin Tegmark Wisell says that it is obvious that you need to look more at specific groups to get an even better idea of what the infection looks like in society. This is because the infection is spread in clusters by an infectious person in his social life, in the common household or in a workplace.
"We see this kind of cluster infection more and more," she says.
On Thursday, the Public Health Agency also comes up with new figures on how many Swedes carry antibodies. The Authority's study is considerably smaller than that conducted by Werlabs, but also contains children.
The results so far show that 6.1 percent of those tested in outpatient care for a disease other than covid-19 on May 15 had antibodies after undergoing covid-19. But that figure is likely to change when the new results are presented on Thursday.
During the period from April 20 to May 31, the Public Health Authority collected 1,600 samples from blood donor centers and then another almost as many from outpatient care.
- A group that is normally representative of the population, but probably not this spring, according to Karin Tegmark Wisell.
Children up to the age of 19 are the group where the largest proportion, 7.5 percent, has antibodies according to figures from the Public Health Authority. According to Karin Tegmark Wisell, the group consists mainly of healthy young people who do allergy investigations and thus give a better reflection of the population.
A smaller study that has targeted Stockholm, Skåne and Umeå shows the same tendency. Of 1,071 tested, 10.1 per cent were found to have recently undergone infection or have an ongoing infection, in some cases without developing immunity.
- We will continue to take samples on those who want to, says Henrik Kangro, medical director at Min Doktor who performed the tests.