Human Metapneumovirus (HMPV)
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What is human metapneumovirus (HMPV)?
Human metapneumovirus (HMPV) is a virus that usually causes symptoms similar to the
common cold. It often causes
upper respiratory infections, but it can sometimes cause lower respiratory infections like
pneumonia, asthma flare-ups or make chronic obstructive pulmonary disease (COPD) worse. HMPV infections are more common in the winter and early spring.
Most people get HMPV before they turn 5. You can get HMPV again, but symptoms are usually mild after your first infection.
Is human metapneumovirus just a cold?
Human metapneumovirus most often causes symptoms similar to a cold, but some people can get very sick. You’re more likely to get severely sick the first time you get HMPV, which is why young kids have a greater risk for serious illness. You get some protection (immunity) from your first infection and then are more likely to have mild, cold-like symptoms if you get another HMPV infection. Adults over 65 and people with breathing problems or a
weakened immune system may also get severe symptoms.
How common is human metapneumovirus?
Researchers estimate that about 10% to 12% of respiratory illnesses in children are caused by HMPV. Most cases are mild, but about 5% to 16% of children will develop a lower respiratory tract infection like pneumonia.
Is human metapneumovirus the same as RSV?
It’s not the same, but human metapneumovirus is similar to
RSV (respiratory syncytial virus). It’s part of the same genus — or scientific grouping — as RSV (Pneumovirus), and can cause similar symptoms. The peak age for severe illness from HMPV is between 6 and 12 months, but RSV is more likely to cause severe illness in infants younger than 6 months.