influenza virus type B

influenza virus type B

n.
A myxovirus of the genus Influenzavirus, antigenically varying from influenza virus type A and influenza virus type C, that causes various respiratory illnesses in humans.
References in periodicals archive ?
H1N1 (2009) virus has been the most commonly detected influenza virus so far this season but in the recent weeks there has been a shift towards influenza virus type B and influenza A (H3N2), with a decreasing proportion of H1N1 (2009) viruses.