john hendren has the details.he flu season has started and americans need to be vaccinated, now more than ever. >> this is the most ambitious vaccination program ever mounted. the number of doses of vaccine, the quickness with which the vaccine has been produced. >> doctors will receive 600,000 tubes of nasal vaccine. another 50 million vaccine doses should be ready following week. many americans are not so sure. about six in 10 adults are not certain they will be vaccinated. about four in 10 parents are not sure they will get their children vaccinated. >> i am not concerned about getting the swine flu. >> if i can keep a child from getting an illness that will keep them from staying at a school, practice saying something. >> the priority list includes pregnant women, young people, and people with chronic health conditions such as diabetes. caregivers are on the front lines. >> we have increased employee absences due to fevers, flu-like symptoms. >> pregnant women in particular are possible. 100 have been sent to