I went to the local fair Monday and there were plenty of pigs, as well as other farm animals. There were also posters advising handwashing and many (new) alcohol rub handwashing stations. That was the appropriate response to this swine flu. This strain of swine flu (H3N2) was first identified last year. Well, new strains are the rule, not the exception. It is not especially virulent. It doesn't transmit well to humans. Most people affected have been children, suggesting that older people are likely to have some immunity from prior flu seasons.
More to the point, this year's flu shot will not provide immunity for the new strain.
Sure, the strain might mutate and spread better in future. It might become more virulent. It might start affecting more adults. And pigs might fly.