San Francisco is getting ravaged by multiple viruses. Experts aren't sure why.
Yahoo • • health
Key Points:
- San Francisco is currently experiencing high rates of various gastrointestinal and respiratory viruses, including rotavirus, norovirus, human metapneumovirus (HMPV), influenza A and B, and RSV, despite low COVID-19 levels.
- Wastewater data shows a significant increase in rotavirus cases in 2026 compared to 2025, potentially linked to changes in vaccination recommendations by the Department of Health and Human Services, which no longer endorses routine rotavirus vaccination for children.
- Health experts attribute the rise in multiple viruses to factors such as lower vaccination rates, introduction of new flu strains, and reduced public immunity, causing viruses typically seen in winter to persist into spring.
- To mitigate illness, experts recommend practicing good hygiene like hand-washing and staying current with vaccinations for flu and rotavirus.
