More than one in four people in the US say they are unwilling to get the COVID-19 vaccine. That statistic is especially concerning because many are from the communities that have been hit hardest by the pandemic. There is an urgent public health need, therefore, not only for the vaccine itself but also for effective messaging to ensure uptake. This is the question we addressed in our latest US trial in which we tested four messages to see their effects on vaccine uptake.
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