Flu is a influenza which is commonly shortened as flu. It is an extremely contagious respiratory illness caused by influenza A and A virus. Flu appears mostly in early spring and in winter season.
Swine flu is a viral infection basically found in pigs that is caused by swine influenza virus. It is very rare to get swine flu in humans except in some cases where people have direct contact with pigs. Currently, the nature of swine flu virus transmission has changed and it can be transmitted from humans to humans even if there is no prior contact with pigs. There are four main sub-types of the virus, but the most recent isolated influenza viruses from pigs have been H1N1 viruses.









