About Swine flu

The swine flu virus we are discussing here is the 2009 H1N1 type A influenza, a human disease. It’s a zoonotic disease which originally was transmitted from pigs to humans and now spreads from one human to another. The symptoms of swine flu are very similar to regular influenza and include fever, headaches, chills, diarrhoea, coughing and sneezing. One can prevent infection by maintaining basic hygiene and wearing a proper surgical mask during flu season. The number of cases shoots up during the summers and monsoon seasons. There are various vaccines available to combat the disease and antiviral treatments for prevention as well. One should however only use these medicines under a doctor’s supervision as indiscriminate use might result in susceptibility to the virus.

Swine flu is a respiratory illness caused by the swine influenza virus (SIV). The pandemic of swine flu was caused by the SIV sub type H1N1. But other subtypes H1N2, H1N3, H3N1, H3N2 and H2N3 can also cause the illness. The virus was termed H1N1 because it mainly exhibited two types of antigens hemagglutinin 1 and neuraminidase 1.

The illness is originally known to affect pigs. It is known to have spread to humans who came in direct contact with pigs. However, the new virus or the mutated type of virus that has emerged over the years has the ability to affect humans without direct contact with pigs. The virus is transmitted from person to person through the same medium as other flu viruses.

A healthy person may acquire the infection by inhaling droplets expelled by the infected person while coughing or sneezing or by contacting surfaces infected with the virus. The virus is not transmitted directly by eating cooked pork.