The girl had suffered from a fever for 3 days before her health suddenly deteriorated, according to Professor Van Gucht of the scientific committee in Belgium.

Van Gucht also said that at such a young age due to coronavirus is ‘very exceptional’. There have now been 705 deaths in Belgium with a total of 12,775 cases.
Yesterday a 12-year-old girl has died. She had tested positive for the Coronaviyrs.
After three days of having a fever, her health suddenly worsened,’ Van Gucht said at a press conference on Tuesday.
‘This is something that touches all of us deeply, as parents and as people, and we want to give our sincerest condolences to her parents, family, and friends.