The rapid spread of infection and the slow vaccine deliveries have led several European countries to re-plan.

Spain recently decided that people under the age of 55 who have had a corona infection should only receive one vaccine dose.

France made the same decision in mid-February.

In Italy and Norway, the issue is currently being debated.

- It is a very good way to save on vaccine doses, says Gunilla Karlsson Hedestam in Aktuellt.

- The second dose does not even have any effect if you have been infected and get two doses close by.

It will be a missed dose.

Tegnell: May be relevant

During Tuesday's press conference, state epidemiologist Anders Tegnell was asked whether Sweden should also invest in only giving a vaccine dose to people who have had covid-19.

- We follow that development closely and try to get data on how it works.

Our assessment is that it is not a good idea for the groups we are vaccinating right now, the oldest and most fragile, where there is some data that suggests that the second syringe is very important.

- It may possibly be relevant when we come to the larger population groups, but we will see then, it also depends on what vaccine supply we have then.

Gunilla Karlsson Hedestam agrees that the oldest should receive double doses.

But she points out that many in the younger population do not need a second syringe.

- If you look at young adults where up to 20-30 percent have had the infections in the big cities, there is a dose that is fully sufficient.

- I would probably say that if you had a positive virus test or positive antibody test within four months, then a dose is enough.

If you do not know or if it has been a long time, then you should take both doses.