Influenza virus

There are three types of influenza viruses: A, B and C. Human influenza A and B viruses cause seasonal epidemics of disease almost every winter in the United States. The emergence of a new and very different influenza virus to infect people can cause an influenza pandemic. Influenza type C infections cause a mild respiratory illness and are not thought to cause epidemics.

Full: Influenza virus
Japanese: インフルエンザウィルス, Infuruenza uirusu
Type: Virus

Manga Notes:
Story Details:
We first see the Influenza virus when Sawaki Tadayasu is brought to the hospital, mistakenly diagnosed with food poisoning from O-157 E. coli. Sawaki is arguing about staying at the hospital overnight and someone with a mask coughs and hundreds appear.