It was last week that several children suffered from vomiting and diarrhea after bathing in the marina in Täfteå.
Now the answers to the tests have come - the children have suffered from winter vomiting.
Winter vomiting is caused by norovirus.
- It agrees well with the symptoms, says infection control doctor Stephan Stenmark.
Can be spread via water
The fact that the disease has probably spread through the water does not surprise the infection control doctor.
- It is well described in many places around the world.
It does not happen often and it has not happened often in Västerbotten, he says and continues:
- If you get a fecal contaminant in bathing water then it can happen.
"Bathing in public bathing areas"
Just like the municipality's environmental and health protection, Stenmark also recommends that bathers should stick to public bathing areas where the water is sampled.
The danger in the marina in Täfteå may probably be over soon.
- The most likely is that it is a short-term effect and that it will then be diluted, says Stephan Stenmark.
In the clip above, you hear him talk about the danger and why winter vomiting can also occur during the summer.