Abbreviation of 鳥インフルエンザ. Common in news reports and casual discussion of the disease.
See also: 鳥インフルエンザ
An outbreak of bird flu was confirmed again this year.
Poultry farms were disinfected as a measure against avian influenza.
Abbreviation of 鳥インフルエンザ, from 鳥 (bird) + インフルエンザ (influenza).