"There hasn't been enough studies yet to base a decision on. We will await the results and then make a decision based on scientifically proven facts," said Swedish Minister for Health, Maria Larsson, to Swedish Radio News.
And according to Anders Tegnell of the National Board of Health and Welfare, there are as of yet no plans to change the upcoming vaccination campaign in Sweden.
"When we have finished distributing the first dose we should have reached November or December. By then we should have more reliable information," he said to Radio News.
Sweden has purchased two doses of vaccine for everyone - a total of 18 million doses. But if many can do with just one, the Board calculates the surplus to be around 5 million doses. And in that case the vaccine with be sold to other countries in need, according to the Minister for Health.