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U.S.A."],"published-print":{"date-parts":[[2021,12,28]]},"abstract":"<jats:title>Significance<\/jats:title>\n                  <jats:p>In communities that remain below the immunity threshold needed to blunt COVID-19\u2019s spread, SARS-CoV-2 has a greater chance of mutating to evade vaccines. This study underscores the central role of trust and knowledge in increasing the likelihood of vaccinating. Trust in scientific institutions and spokespersons anchors time 1 vaccination intentions and knowledge affects them at both times 1 and 2. These background (non\u2013COVID-specific) factors as well as flu vaccination history and patterns of media reliance played a more prominent role in shifting individuals from vaccination hesitance to acceptance than did COVID-specific ones. 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