Robust Hepatitis A Vaccination Response Within the United States Veterans Health Administration in the Wake of State Outbreaks.

Moon, Andrew M; Borgerding, Joleen A; Hauser, Ronald G; Lowy, Elliott; Chartier, Maggie; Maier, Marissa M; Morgan, Timothy; Ruege, Adam et al. · Am J Public Health · 2022

cross_sectional · Level IV

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Abstract

We assessed hepatitis A (HepA) vaccine receipt among susceptible individuals in outbreak and matched nonoutbreak states. Difference-in-differences models and multivariable logistic regression were used to compare HepA vaccination rates in these states. In the postoutbreak year, there was a 112% increase in HepA vaccinations in outbreak states versus a 6% decrease in nonoutbreak states. Differences persisted in our multivariable model (adjusted odds ratio = 2.53; 95% confidence interval = 2.45, 2.61). HepA vaccination rates increased dramatically in outbreak states, but many individuals susceptible to hepatitis A virus remain unvaccinated. (<i>Am J Public Health</i>. 2022;112(7):990-994. https://doi.org/10.2105/AJPH.2022.306845).

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