New Virus Spreading in California with No Known Treatment

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A respiratory virus called human metapneumovirus (HMPV) is spreading in parts of California, according to wastewater data. HMPV can cause cough, fever, nasal congestion, and shortness of breath, and in some cases lead to more severe conditions like asthma attacks and bronchiolitis. While public health officials say there's no need for alarm yet, the lack of a vaccine or specific treatment regimen for HMPV is raising concerns.

Why it matters

The spread of HMPV highlights ongoing vulnerabilities in the U.S. public health infrastructure, which has faced challenges in responding to new and emerging infectious diseases. The virus's ability to cause severe illness in some cases, combined with the lack of available treatments, raises worries about its potential impact, especially on vulnerable populations.

The details

According to data from the WastewaterScan Dashboard, a majority of Northern California communities have seen high concentrations of HMPV detected in their wastewater. The virus can lead to symptoms like cough, fever, nasal congestion, and shortness of breath, and in some cases trigger more severe conditions such as asthma attacks, middle ear infections, bronchiolitis, and croup. The first human case of HMPV was confirmed in 2001 in the Netherlands, and it has since spread globally.

• The WastewaterScan Dashboard has detected high levels of HMPV in Northern California communities.