Abstract Rationale Influenza-pneumonia causes 50,000-60,000 annual U.S. deaths despite widespread vaccine availability. Beyond vaccine hesitancy lies an understudied phenomenon: the "silent majority" disconnected from health information channels entirely. We hypothesized that states with lower online health information-seeking would demonstrate persistently higher influenza-pneumonia mortality, identifying "information deserts" where digital campaigns fail to reach vulnerable populations. Methods We integrated CDC WONDER mortality data (1999-2020) for all U.S. states with Google Trends vaccine information-seeking data. We created a composite Health Information Engagement Index by averaging normalized search volumes (0-100) across four vaccine-related terms: "flu shot side effects," "flu vaccine dangers," "do I need flu shot," and "flu vaccine safety." We examined correlations between state-level engagement indices and age-adjusted mortality rates (2017-2020) using Spearman correlation, stratified states into engagement quartiles, and performed temporal trend analysis (1999-2020). Results Over 1999-2020, the U.S. experienced 1,253,017 influenza-pneumonia deaths (mean: 18.7/100,000). National mortality declined 25.8% from 1999-2001 (22.6/100,000) to 2017-2019 (16.8/100,000), yet state-level variation persisted (2.2-fold range: 11.2-24.6/100,000). States with LOWER health information engagement showed significantly HIGHER mortality. The Spearman correlation was r=-0.58 (p 0.001), with lowest engagement states (mean index 24.1) experiencing mortality of 19.4/100,000 versus 13.9/100,000 in highest engagement states (39.6% difference, p 0.001). This inverse relationship held across all four search terms and persisted throughout 1999-2020, with the disparity actually widening from a 4.7-point gap (1999-2001) to 5.5 points (2017-2020). Conclusions This first comprehensive analysis reveals a profound paradox: states with LOWEST online vaccine information engagement—not highest—bear the greatest mortality burden. High search volumes reflect active health engagement in populations that ultimately vaccinate, while the "silent majority" in "information deserts" (13 lowest-engagement states, ∼78 million Americans) remains disconnected from digital health channels entirely. The 39.6% mortality differential translates to ∼4,300 preventable annual deaths. Current digital-centric campaigns systematically fail populations most at risk. Achieving health equity requires multi-channel interventions: community health workers, partnerships with trusted local institutions, traditional media, mobile vaccination clinics, and broadband expansion as health infrastructure. The populations we should worry about most are not those actively searching for vaccine information but those who search for nothing at all—disconnected, invisible to digital public health infrastructure, and dying in silence This abstract is funded by: None
Asante et al. (Fri,) studied this question.