Survey finds 34% COVID-19 vaccination coverage among U.S. adults aged 18-39 years

An observational survey examined COVID-19 vaccination coverage and intent among U.S. adults aged 18-39 years during March-May 2021. The study population was not further specified, and no comparator group was reported. The primary outcome was not defined, and sample size was not reported.

Regarding main results, 34% of respondents reported having received a COVID-19 vaccine. The lowest reported vaccination coverage and intent were found among adults aged 18-24 years, non-Hispanic Black adults, those with less education, those without health insurance, and those with lower household incomes. Commonly cited barriers to vaccination included concerns about vaccine safety and effectiveness. No effect sizes, absolute numbers, or statistical measures were reported for these findings.

No safety or tolerability data were reported. Key limitations include the observational, survey-based design using self-reported vaccination status and intent, which cannot establish causation. The findings are specific to U.S. adults aged 18-39 years during March-May 2021 and may not be generalizable to other populations or time periods. Practice relevance was not reported, but clinicians should interpret these demographic patterns cautiously as associations rather than causal relationships.