Parachutes have not been subjected to rigorous evaluation by using randomized controlled trials.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC300808/
:D
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC300808/
:D
While we are not QUITE as clearcut as parachutes, this is still an area where we can reasonably conclude that the vaccine is vastly safer than being unvaccinated.