Another thing that seemed to work is the unvaccinated getting sick themselves.
2/3 of the unvaccinated COVID patients who were admitted to hospital regretted their decision, declared they would promote the vaccine post-discharge, and declared they would get it post-discharge.
2/3 of the unvaccinated COVID patients who were admitted to hospital regretted their decision, declared they would promote the vaccine post-discharge, and declared they would get it post-discharge.
https://pmc.ncbi.nlm.nih.gov/articles/PMC8950102/