Last month, a frantic call came into the National Fire Agency’s 119 Safety Reporting Center. A family member reported that Ms. A, a woman in her 70s living in northern Seoul, was vomiting blood.

Norovirus levels are increasing across California, and the rise is especially notable in the Los Angeles and San Francisco ...

Health officials said cases of norovirus, also known as the “winter vomiting disease,” have been spiking across Southern California ahead of the winter season. The contagious virus ...