Parvovirus Spreads Through Northern California

A contagious virus, parvovirus B19, commonly known as the "slapped cheek" virus, is circulating throughout Northern California. Recent wastewater surveillance data has confirmed its presence in the San Francisco Bay Area and the Sacramento region.

This virus typically causes mild, flu-like symptoms, rashes, and joint pain, usually resolving within seven to ten days. However, it can reemerge for several weeks. Children aged five to nine are particularly susceptible due to close contact in school settings. Adults who have not been previously infected are also at risk, especially those with weakened immune systems.

The virus has been detected in wastewater systems across several cities, including San Francisco, Sacramento, Davis, Napa, Palo Alto, Redwood City, San Jose, Sunnyvale, Vallejo, and the South County Region. Moderate levels of positive samples were noted in San Francisco, Sacramento, Davis, Napa, Redwood City, and San Jose.

Concerns are elevated for pregnant individuals, as parvovirus B19 can transmit to the fetus, potentially leading to miscarriage or developmental issues. The Centers for Disease Control and Prevention advises pregnant women, immunocompromised individuals, and those with blood disorders to consult their healthcare providers.