Statistical model to estimate the proportion of Tampa Bay residents with vaccine-induced pH1N1 virus seropositivity in November- December 2009.

1Estimated from Behavioral Risk Factors Surveillance System (BRFSS) and National 2009 H1N1 Flu Survey (NHFS) for adult vaccination through mid-November and a weighted pediatric vaccination estimate for the two week period prior to specimen collection (November 1 – December 16, 2009).2Estimated proportion of population with vaccine-induced seropositivity (≥1∶40 GMT) = (vaccine coverage) x (proportion with ≥1∶40 seropositivity).3Estimated proportion with pH1N1 virus infection prior to vaccination = ([assay adjusted seroprevalence] minus [estimated proportion of population with vaccine-induced seropositivity]) x (estimated proportion of population with vaccine-induced seropositivity).4Proportion with vaccine-induced seropositivity not infected prior to vaccination = (estimated proportion of population with vaccine-induced seropositivity) minus (estimated proportion of population with pH1N1 virus infection prior to vaccination).