Eventually will the swine flu ever die out?

Answer 1

Most flu epidemics or outbreaks do eventually seem to die out, however, they tend to move in waves and may resurface when it seemed to have died out.

Except for perhaps smallpox, most viruses never totally die, they may mutate into a form that is less virulent or we may develop immunity to them as they are and so for them to infect us again, they would have to mutate into a new strain. Flu viruses are able to and do continually and rapidly change into new strains.

But sometimes the virus is just dormant, this is true during the hot summer season, since most influenza viruses spread best during the colder months of the year or during the "flu season". And since the Southern Hemisphere of the earth is having summer when we have our Northern Hemisphere flu season, when it is summer here and winter there, the viruses we thought were gone can turn up on the other side of the world and continue to spread.