Portrayal of Immunization in American Cinema: 1925 to 2016.

The American media often disseminates antivaccination messages. Cinema in particular reaches many individuals and influences attitudes regarding high-risk behaviors such as smoking and alcohol use. We hypothesized that negative cinematic portrayals of immunization have increased over the last 3 decades. Films released in the United States featuring immunization through 2016 were identified on IMDb and viewed in their entirety by 2 reviewers. Themes were recorded, and the portrayal of immunization (positive, negative, or mixed) across each decade was assessed in a logistic regression model. Cultural references attributed to films (eg, television references) were recorded from the "connection" feature on IMDb. Fifty relevant films were identified (1925-2016). Negative/mixed portrayals of immunization were more frequent after 1990 (odds ratio = 4.0, 95% confidence interval = 1.2-13.5), and films with positive immunization portrayals garnered significantly fewer cultural references than films with negative/mixed portrayals (mean = 9.2 vs 56.2, P = .048). American cinema features increasingly negative portrayals of immunization.