A new study of African Americans with poorly controlled asthma, found differences in patients' responses to commonly used treatments. Contrary to what researchers had expected, almost half of young children in the study responded differently than older children and adults, and than white children in prior studies.
source https://www.lifetechnology.com/blogs/life-technology-medical-news/study-assesses-asthma-treatment-options-in-african-american-children-and-adults