The research, based on 1,100 tests across Sweden and carried out by the country's public health agency, found that just 7.3% of people had developed antibodies which could provide immunity, Reuters reported.
Sweden's state epidemiologist Anders Tegnell stated it was once deceptive to have a look at the dying toll over a unmarried seven-day duration.
Sweden has revealed that despite adopting more relaxed measures to curb COVID-19, merely 7.3 per cent of Stockholm's inhabitants had developed Covid-19 antibodies by the end of April, according to recent study.
Herd immunity Most of the given population - 70 to 90% - become immune to an infectious disease, either because they are infected and recovered or by vaccination.
The low percentage runs counter to the strategy of the country's chief epidemiologist, who'd predicted that by keeping schools, restaurants, bars and businesses open, enough people would soon develop immunity to the infection to slow the disease from spreading catastrophically. However, he asked people to refrain from making long journeys, placing an emphasis on personal responsibility.More news: S&P/TSX composite edges higher as U.S. stock markets fall; Loonie down
Experts say at least 60% of people need to catch the virus before any protective immunity can be achieved.
The strategy was criticized by Swedish researchers early on, who said that attempting to create herd immunity had low support. In Spain, 5% of people had developed coronavirus antibodies by May 14, according to preliminary results of an epidemiological study by the government.
The UK, Belgium and the USA, have 5.57, 4.28 and 4.11 deaths per 1 million people whilst Sweden has 6.08 deaths per million. A report he wrote along with other epidemiologists and a historian estimated that it would take 18 to 24 months.
The World Health Organization has warned against pinning hopes on herd immunity.
Asked if her company is comfortable with immunity passports based on tests, Swiss drugmaker CEO Roche Severin Schwann told CNN's Julia Chatterley: "I believe we are in a very vague world, and we also have to make decisions on incomplete information".More news: The EU's strict rules may delay coronavirus contact-tracing apps
Bjorn Olsen, a professor of infectious medicine at Uppsala University, told Reuters, "I think herd immunity is a long way off, if we ever reach it".
Defending the strategy, Health and Social Affairs Minister Lena Hellengren said most Swedes had voluntarily minimised their social interactions and movements outside the home. "At least 20% of the intensive care beds were always empty and Covid-19 was able to take care of patients", he said.
"In the autumn there will be a second wave", Tegnell said.
"It will definitely affect the reproduction rate and slow down the spread", he said, but added that it wouldn't be enough to achieve "herd immunity".
"It is of course bad that we have such a higher death toll at our elderly care homes, and there are lessons to be learned for those who work in these institutions".More news: NY son kills father during Zoom meeting
Sweden has now had 32,172 cases and 3,871 deaths, according to figures from Johns Hopkins University.