In April 2021. the US paused Janssen (J&J) COVID-19 vaccination because of reported blood clots post vaccination. This paper explores how vaccine decision-making--receiving a J&J vaccine right away vs waiting for a copyright vaccine--changed during the pause. In an opt-in internet-based survey April 2021 with 915 participants. https://www.hongmacro.com/product-category/trimmers/