Washington ? The people who most want the swine flu vaccine are older people, who will be last in line, says a new Associated Press-GfK poll.

The survey raises questions about government efforts to stem illnesses already spreading widely across the country.

Vaccine started trickling out this week, but only 52 percent of Americans say they’re likely to line up for it, said the poll released Wednesday.

This brand-new flu — what scientists call the 2009 H1N1 strain — is mostly a younger person’s infection. Children, young adults and pregnant women are supposed to be first in line for vaccinations.

Yet 62 percent of people 65 and older say they’ll likely seek a swine flu shot, even though that older generation appears to have some resistance to the new strain — and thus is supposed to wait to be vaccinated until those with a higher risk go first. In contrast, 45 percent of people ages 18 to 29 want to be vaccinated.

On the other hand, interest in the regular winter flu vaccine is rising: 57 percent of adults want that inoculation, a 9-point increase since the first AP poll on the subject in July.