Infectious disease experts say the avian flu case that infected a 13-year-old in British Columbia shows “worrisome” signs that the virus could be mutating to more easily infect humans, but that the tr ...
Norovirus causes an inflammation of the stomach or intestines called acute gastroenteritis, according to the CDC. The virus is “very contagious,” and symptoms include vomiting, diarrhea, stomach pain, ...