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Hidden Virus Spreading Through Northern California
3 Mar
Summary
- Human metapneumovirus is circulating in Northern California.
- Symptoms resemble common colds but can include croup.
- No specific treatments or vaccines currently exist for HMPV.

Human metapneumovirus (HMPV), a respiratory virus that typically circulates from winter through spring, is currently experiencing a surge in Northern California. Data indicates high concentrations of HMPV in wastewater across several Bay Area locations, including San Francisco, Marin, and Sacramento.
This virus causes familiar symptoms such as cough, fever, and congestion. While generally mild for healthy children, HMPV can lead to more serious conditions like bronchiolitis and croup, characterized by a distinctive 'barking' cough. Experts note that with reduced COVID-19 activity, other viruses like HMPV are becoming more prominent.
Preventing the spread of HMPV involves consistent hand washing, cleaning surfaces, and staying home when unwell. Currently, there are no specific vaccines or treatments for HMPV, with recovery typically managed through rest and hydration.


