People who say they’ll get vaccinated against COVID and flu often don’t. Why not?

“Research examining vaccine uptake has largely focused on vaccine hesitancy and willingness to vaccinate, often treating stated intentions as proxies for subsequent behavior,” write the researchers, led by a team at the Institute for Implementation Science in Population Health in New York City. “However, intending to be vaccinated does not necessarily translate into subsequent vaccine receipt, and under-vaccination may reflect not only vaccine refusal, but also breakdowns in the pathway from willingness to action.”