Most of hMPV-infected children younger than 1 year of age had LRTI, and in particular they developed a typical bronchiolitis, whereas children older than 1 year of age had a greater proportion of ...

Less commonly, bronchiolitis may also be caused by cold viruses (such as rhinovirus, adenovirus, or coronaviruses), metapneumovirus, human bocavirus ... may also occur due to exposure to irritants ...