Genetic Variability: Different populations have distinct genetic backgrounds, which can influence susceptibility to diseases and response to treatments. Cultural Practices: Cultural beliefs and behaviors can affect health practices, access to healthcare, and adherence to medical advice. Socioeconomic Status: Income, education, and occupation can influence health outcomes through access to resources, stress levels, and living conditions. Environmental Exposures: Different populations may be exposed to varying levels of pollutants, pathogens, and lifestyle-related risks.