In connection with the covid recommendations, other viruses were also pushed back, including RS, which can affect the respiratory tract of smaller children, and calicivirus, which causes winter vomiting.

During the autumn - after the restrictions were released - the former has been widely spread.

- We usually always see a small and short-term infection peak when schools and preschools open after the summer, but this year it has not subsided but on the contrary only increased.

It has been extreme, says pediatrician Fredrik Cederblad.

If the RS virus can get such a spread, the winter vomiting disease can also be extensive, Fredrik Cederblad believes.

- Last year there were only a few cases and the winter was super calm in terms of all infections except covid.

This means that many have low immunity now, and there is a clear risk that the stomach illness season will also be tough now, he says.

In the clip above, the pediatrician tells more about winter vomiting.