H1N1, H1N2, H2N1, H3N1 and H3N2 are subtypes of which influenza virus?
The principle of microbial physiology explains that growth regulation and host interactions follow molecular programs. Hence influenza A fits best because it corresponds to prokaryotic strategies, as documented in authoritative sources on microbiology.
Ref: Madigan et al., Brock Biology of Microorganisms, 15th Edition, Chapter 13, Virology, explains viral replication and virus-host interactions detailing microbial genetics.
