Like the seasonal influenza, H1N1 influenza in humans can vary depending on the severity easy to carry. From 2005 until January 2009, 12 people with H1N1 influenza have been found in the United States, not of death. However, infection with H1N1 avian influenza can be severe. In September 1988, well before the age of 32 years and the woman in Wisconsin to the hospital for a lung inflammation after infection with influenza H1N1 and died 8 days later. An outbreak of H1N1 bird flu at Fort Dix, New Jersey joined in 1976 has caused more than 200 cases with severe illnesses and deaths in a certain number of people.