Influenza C

Influenza C viruses infect both humans and pigs, but do not infect birds.^[4] Transmission between pigs and humans have occurred in the past.^[5] For example, influenza C caused small outbreaks of a mild form of influenza amongst children in Japan^[6] and California.^[6] Due to its limited host range and the lack of genetic diversity in influenza C, this form of influenza does not cause pandemics in humans.^[7]