Survey Methodology
The Hepatitis B Perceptions and Insights Survey was conducted online within the United States by The Harris Poll on behalf of Dynavax Technologies among adults ages 18+ from September 30 - October 2, 2024 (N=2,090), and from April 10-14, 2025 (N=2,079). Data was weighted where necessary by age, gender, region, race/ethnicity, household income, education, marital status, size of household, and political party affiliation to reflect their actual proportions in the population.
Respondents for this survey were selected from among those who have agreed to participate in our surveys. The sampling precision of Harris online polls is measured by using a Bayesian credible interval. For this study, the total sample data is accurate to within +/- 2.5 percentage points using a 95% confidence level. This credible interval will be wider among subsets of the surveyed population of interest.
All sample surveys and polls, whether or not they use probability sampling, are subject to other multiple sources of error which are most often not possible to quantify or estimate, including, but not limited to coverage error, error associated with nonresponse, error associated with question wording and response options, and post-survey weighting and adjustments.
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2. Centers for Disease Control and Prevention. Hepatitis B Basics. Accessed April 17, 2025. https://www.cdc.gov/hepatitis-b/about/index.html
3. Data on file. Dynavax Technologies Corporation. Flow model for universal hepatitis B vaccination (version 4.5) assumptions. May 24, 2021.
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6. HHS Viral Hepatitis National Strategic Plan Overview, 27 November 2024. Available: https://www.hhs.gov/hepatitis/viral-hepatitis-national-strategic-plan/national-viral-hepatitis-action-plan-overview/index.html