Judith swims length after length in Eriksdalsbadet in southern Stockholm.

She does not have as much strength as before but otherwise she feels good again.

It has now been several months since she was hospitalized, seriously ill from a sequelae triggered by the coronavirus.

Ever since the pandemic began, it has been clear that the virus is hitting the elderly hardest.

But for a while into the pandemic, it turned out that the virus can also trigger a very dangerous disease, a hyperinflammation, which can be fatal, in a few children.

Judith is one of the approximately 240 children in Sweden who have been affected.

- Almost my whole class got corona at the beginning of the year, and then I think I got it too, Judith says.

A few weeks later I had strange symptoms and a very high fever.

Over 40 degrees fever

- Judith swelled up enormously in the face and down to the neck.

She got pain in her joints and muscles and then the fever rose very quickly, says her mother Hanna Toorell.

We thought it was an allergic reaction and went to the hospital, but were sent home again.

The next day Judith was even sicker and her mother went with her to the hospital again.

Then Judith was hospitalized and pretty soon was diagnosed with MIS C, Multisystem Inflammatory Syndrome in Children.

- You probably do not remember it because you were almost unconscious, says mother Hanna and looks at Judith, but on Tuesday you were very, very sick.

We did not even get in touch with you.

Then I was very worried.

Judith's mother Hanna remembers the anxiety when Judith was "very, very sick" Photo: Zsolt Czinkóczky, SVT

Good care for MIS C in Sweden

- We have seen a number of cases like this in Sweden and have become good at diagnosing and treating them, says Judith's doctor Lotta Nordenhäll at Södersjukhuset in Stockholm.

Elsewhere in the world, children have died of MIS C, but in Sweden no child has died.

It has now been a few months since Judith came home from the hospital and most things are as usual again.

Judith trains swimming several times a week.

- I do not have the strength as much as before, can not swim as far, but otherwise I feel completely fine, says Judith.

When asked if she wants to be vaccinated against the coronavirus, the answer is clear.

- Yes, I would definitely get vaccinated, but since I have antibodies against the virus, I think others who do not have it should get vaccinated before me - so I can wait a bit.