Stomach Flu 2025 California. Per guidance from the centers and disease control (cdc), dr. Annually, norovirus causes 19 to 21 million cases of vomiting and diarrhea in the u.s., 465,000 emergency room visits, 109,000 hospitalizations, and 900 deaths, per the cdc.
Norovirus is on the rise overall in the united states, federal officials say, even as the west sees a slight dip in reported cases. Antibiotics aren’t effective against viruses.