H1N1 also known as “Swine flu” is a contagious human respiratory infection caused by influenza viruses that infect the respiratory tract of pigs. It was first recognised in the 1919 pandemic and still circulates as a seasonal flu virus. The incubation period for swine flu is about one to four days, with the average being two days.
Swine flu is transmitted from person to person by inhalation or ingestion of droplets containing virus from people sneezing or coughing. It is not transmitted by eating cooked pork products.