Flu Virus Transmission: Animals to Humans
Many different species, including ducks, chickens, pigs, whales, horses, and seals, have been infected with flu viruses. Besides birds, which host every known strain of influenza A viruses, various subtypes are exclusive to certain animals. Influenza A strains H3N2 and H1N1 affect people. The H1N1 and H3N2 virus infections in pigs and the H7N7 and…