The brand new H1N1, or swine flu, vaccine is being tried out on children at eight medical centers across the country. If the tests go well, the vaccine will be available to school children nationwide.

"We don't know the results," said Dr. Harry Keyserling, swine flu vaccine researcher. "Otherwise we wouldn't be doing the tests."

The children are volunteered by their parents, like nurse Amanda Strudwick, who signed up both of her little girls.

"I truly believe in vaccines," Strudwick said. "They were a little bit sore. They played it up so they could get ice cream, but they were fine this morning."

The kids get one swine flu shot now, another one later, and a third injection for seasonal flu.

"I know that swine flu has killed a lot of people and it will be good because our family likes travelling all over the place," Strudwick added. "Also because I love to do trials and do things for science because I'm very interested in science."

Vaccine makers are hoping to have the shots available for wide scale distribution by October.

"The flu vaccine has been around for decades," Keyserling said. "The process for making the vaccine is the same. The only question is what strain you're going to make in that particular year and that particular batch."

Most pediatricians said if the trials go well, they will recommend their patients get the swine flu vaccine.