Vulnerable populations include patients who are racial or ethnic minorities, children, elderly, socioeconomically disadvantaged, underinsured or those with certain medical conditions. Members of vulnerable populations often have health conditions that are exacerbated by unnecessarily inadequate healthcare. (National Institutes of Health)
Combine the above terms with terms like these:
**Please note that language describing Indigenous Peoples is from a Western Colonizer mindset meaning that specific tribal names, lands and places are broadly lumped together without distinction.