number of flu patients. the flu is most likely to affect nonhealthy adults because the most common strain being spread is h1n1, also known as our old nemesis, the swine flu. joining us is the director for national immunization center. do we know why we re seeing more this season than the last? no. the strains change year to year and this year it s a big h1n1 year. in europe they are seeing more of h3 but we know that the majority of indicateses th majori majority of cases that we re seeing is it affects the youj mo young more than the elderly. remember, it s not too late to protect yourself against the flu this year. that message for everybody listening, get a flu immunization if you haven t