There is a grim history of poor medical ethics surrounding the treatment of African Americans that has resulted in feelings of distrust from some.

https://www.mcgill.ca/oss/article/history/40-years-human-exp...

https://www.washingtonpost.com/news/made-by-history/wp/2018/...

Additionally, medical debt is such a massive burden to many lower income households that there’s this additional layer of distrust, a feeling that you should steer clear of any medical establishment otherwise they’ll try to pin something on you and charge you mountains of money (even though the vaccine is free).

One of the most notable examples is that of the Tuskegee study on untreated syphilis, where we denied effective treatment w/o informed consent.

PoC have higher infant mortality rates, and the myth that PoC have more tolerance to pain (and therefore require less anesthesia) is still quite prevalent.

It was bad enough that we had to actually produce a report on what is considered the "bare minimum", but even that has not been totally effective. (https://www.hhs.gov/ohrp/regulations-and-policy/belmont-repo...)