Respiratory Virus HMPV Surges Across U.S. With No Cure

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Cases of the respiratory virus Human Metapneumovirus (HMPV) are spiking across the United States, with high concentrations detected in areas like San Francisco, Sacramento, Napa, and parts of New Jersey. HMPV can cause upper and lower respiratory illness, especially in young children, older adults, and those with weakened immune systems. While there is no specific treatment or vaccine for HMPV, health officials are urging the public to take preventative measures like covering coughs and practicing good hand hygiene.

Why it matters

HMPV is in the same family as respiratory syncytial virus (RSV) and can lead to serious complications like pneumonia, especially for vulnerable populations. The surge in HMPV cases comes as the U.S. is still dealing with the ongoing impacts of the COVID-19 pandemic, straining healthcare resources in some areas.

The details

HMPV typically circulates in the U.S. from winter through spring each year. Symptoms can include cough, fever, nasal congestion, and shortness of breath, which can progress to bronchitis and pneumonia. The virus spreads through the air from coughing and sneezing, close personal contact, and touching contaminated surfaces. While there is no specific treatment, the CDC recommends taking preventative measures like covering coughs, frequent handwashing, and cleaning high-touch surfaces.

• HMPV typically circulates in the U.S. from winter through spring each year.
• Recent WastewaterSCAN data showed high concentrations of HMPV in several areas of California in 2026.