Guide To The Different Types Of Flu

Type D Flu

Unlike the other types of the disease, type D flu is not currently considered a concern to humans since it almost exclusively affects cattle. However, information indicates it can affect other farm animals as well, such as pigs, and it also hasn't been identified until fairly recently. In fact, a study recently reported the discovery of this form of the flu virus during 2016. While it is not currently thought to affect humans, it is possible influenza D could mutate in a manner that causes it to become a threat to human health. More research is needed on this form of the flu, though currently it appears to only be spread through direct contact.