H1N1
Pathology.
a subtype of the type A influenza virus, with strains that give rise to seasonal epidemics, or sometimes pandemics, including a strain with swine, avian, and human genes responsible for swine flu.
Origin of H1N1
First recorded in 1970–75; abbreviation of
h(aemagglutinin type)1 and
n(euraminidase type) 1