<unk>  is one of the extremely contagious viruses leading to 50% of the gastroenteritis<unk> s worldwide.  An<unk>  of<unk>  is defined as an occurrence of 2 or more similar illnesses resulting from a common exposure that is either suspected or laboratory-confirmed to be caused by<unk> .
Norovirus outbreak
Rotavirus infection
Norovirus infection
COVID-19-associated abdominal pain
Vaccine mediated polio infection
COVID-19-associated nausea and vomiting
COVID-19-associated diarrhea
COVID-19-associated anorexia