How Common Is Metapneumovirus 2025r John 2025. Human metapneumovirus (hmpv) can cause upper and lower respiratory disease in people of all ages, especially among young children, older adults, and people with weakened immune systems. Since then, numerous studies have.
Researchers estimate that about 10% to 12% of respiratory illnesses in children are caused by hmpv. Human metapneumovirus (hmpv) can cause upper and lower respiratory disease in people of all ages, especially among young children, older adults, and people with weakened immune systems.