Nine pupils of the second grader vomited.
When the symptom like an infection more than ten pupils happened at school, the school has to report it to our office.
It was nine pupils this time, but a teacher contacted it for a precaution.
And after inspecting it, norovirus was detected.
Such an infection is breaking out in our area now.
BBC news was reported it, too.
It is called "a vomiting virus" by the article.
The outbreak in our area was only vomiting.