This article describes how members of different ethnic groups have different complications in pregnancy. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7290488/
Here is a review about how race affects Adverse Drug Experiences (In response to commonly prescribed drugs), published in the journal of ethnic and racial health disparities.
https://link.springer.com/article/10.1007/s40615-015-0101-3
Sure it would be better to sequence each person's genome to accurately place them on the spectrum of human genetic diversity, but that's not practical in a hospital or emergency setting.