What is influenza caused by?
insects A bacteria smoking Mold Viruses amoeba Cold weather chemicals
A B C D E F G H
Influenza virus causes widespread human disease.
Influenza is a disease caused by a virus
What is influenza caused by? (A) insects (B) A bacteria (C) smoking (D) Mold (E) Viruses (F) amoeba (G) Cold weather (H) chemicals