Right now, the vaccine is available only to pregnant women, child care workers, and health care workers. Pregnant women are at greater risk for complications, and in fact, there has been more than one death of a pregnant woman in the last few months from the H1N1 virus. Health care workers are at much, much greater risk for exposure than the average citizen. If the pandemic hits the health care industry, we do not have the number of workers needed to take care of the patients.
The vaccine has only been released once. The amount was less that was expected to be ready at the time of release. There will be additional batches released as they become available. Once the two groups at highest risk have been vaccinated, they will move down the line. First to elderly and young children, then to those with a medically compromising condition, then to the general public.