Just curious, but are you referring to the recent Canadian study that showed people who self-selected for vaccination may also be associated with being safer drivers? https://www.amjmed.com/article/S0002-9343(22)00822-1/fulltex...

There's a good take on this study here: https://igorchudov.substack.com/p/the-unvaccinated-had-more-...

TL;DR: The study is fraudulent as it didn't normalize for distance or time driving, which has a extremely strong correlation to traffic fatalities. What the study actually found is that the unvaccinated drive more, and reporting it the other way was intentional fraud.

Driving more is the risky behaviour.