Influenza A virus subtype H1N1

Influenza A virus subtype H1N1, commonly known as swine flu, is a virus that causes respiratory illness in humans. It is a type of flu that spreads easily through coughing, sneezing, or close contact. H1N1 has a mix of genetic material from both human and animal flu viruses. Symptoms can include fever, cough, sore throat, body aches, and fatigue. Vaccines are available to protect against H1N1. It can be serious for certain groups, such as young children, the elderly, or those with weakened immune systems. Proper hygiene and vaccination help prevent its spread.