Definition: An acute inflammatory disease of the lower RESPIRATORY TRACT, caused by paramyxoviruses, occurring primarily in infants and young children; the viruses most commonly implicated are PARAINFLUENZA VIRUS TYPE 3; RESPIRATORY SYNCYTIAL VIRUS, HUMAN; and METAPNEUMOVIRUS.
coord IM with specific virus dis (IM)
Other names Viral Bronchiolitis; Viral Bronchiolitides; Bronchiolitides, Viral