Influenza Type A is a contagious virus that causes seasonal flu outbreaks in humans and animals. It is known for its ability to mutate, leading to new strains that can evade the immune system. This type of influenza is responsible for pandemics, such as the 1918 Spanish flu, and can infect various species, including birds and pigs. Symptoms of Influenza Type A include fever, cough, sore throat, body aches, and fatigue. The virus spreads through respiratory droplets when an infected person coughs or sneezes. Vaccines are available to help prevent infection and reduce the severity of symptoms.