The WHO Clinical Staging System for HIV/AIDS allows physicians in resource-limited settings to make clinical decisions based on patient clinical features instead of laboratory tests.
There are U.S. regulations on drug sales by Internet pharmacies; there is a need to make life-sustaining drugs available at prices more people can afford.
When serving an ethnically diverse population, it is imperative that physicians have an understanding of a patients' cultural background and attitudes towards health, nutrition and personal care.