Vitamin D

https://www.sciencedirect.com/science/article/pii/S096007602...

https://pmj.bmj.com/content/early/2020/11/12/postgradmedj-20...

Statins

https://health.ucsd.edu/news/releases/Pages/2020-09-23-stati...

Vitamin A

https://chrismasterjohnphd.com/covid-19/iga-antibodies-vitam...

More data is probably needed for A.

Aspirin

https://journals.lww.com/anesthesia-analgesia/Abstract/9000/...

Definitely need more data on the aspirin.

Vitamin D is pretty well backed up at this point.

https://vitamindforall.org/letter.html

While on the whole you are completely correct, it's worth remembering that the risks associated with taking recommend doses of vitamins are negligible.

The only plausible confounding factor is people behaving less responsibility in the belief that they are somehow safe. On a personal level, try not to do that.

Yeah, vitamins I understand, but Aspirin has negative effects with constant long term use. I'm just not comfortable with those recommendations without any effort to support.

This is great advice. If you have a chance to get the vaccine, that's the best option. But keep wearing masks, and try to not get the virus in any ways you can. Vitamins are basically boosting your immune system, and as a bonus there are studies that back up that it actually helps in some cases 77% better outcomes (potentially more). That doesn't mean you can't die from covid even if you're taking these vitamins (as well as with the vaccine).