Highly Contagious Human Parvovirus Circulating In Northern CA: What To Know
Patch • • health
Key Points:
- Health officials report a seasonal peak of parvovirus B19, a contagious respiratory virus, spreading across multiple Northern California cities, including Fremont, Napa, and San Francisco neighborhoods, based on wastewater surveillance data.
- While typically causing mild symptoms such as fever and muscle aches, parvovirus B19 poses serious risks for pregnant individuals, including miscarriage, and can cause severe complications in people with weakened immune systems or certain blood disorders.
- The virus, which peaks in late winter and spring, has shown increased rates in 2024 and 2025 compared to previous years, possibly linked to pandemic-related factors, though no vaccine or specific treatment currently exists.
- Health experts emphasize preventative measures such as good hygiene, proper handwashing, respiratory etiquette, surface cleaning, and improved air quality to limit transmission, with special caution advised for pregnant people to avoid high-risk environments.
- The CDC recommends staying home when experiencing respiratory symptoms and prioritizing infection control in healthcare and childcare settings to reduce the spread of parvovirus B19.