Human parainfluenza virus type 3 (PI3 virus) causes mild to severe respiratory tract infection in infants. PI3 virus is an enveloped RNA virus and possesses two glycoproteins, hemagglutinin-neuraminidase (HN) and fusion (F), at its external surface. These two glycoproteins are known to be responsible for initiation and progress of the infection process
Synonyms: PI3
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