An example of an environmental related disease determinant would be which of the following?

• A. Weather
• B. Immunity
• C. Nutrition
• D. Genetics

Answer: (A)

External environmental conditions shape disease risk, and weather is a classic example because it directly influences pathogen survival, vector activity, and human exposure. Temperature, rainfall, and humidity can alter how well mosquitoes breed and transmit diseases, or how long a virus persists in the environment, which in turn changes outbreak likelihood. Immunity, nutrition, and genetics describe traits of the host that affect susceptibility or response to infection, but they are not environmental conditions themselves. Immunity involves the immune system and prior exposure; nutrition reflects dietary status; genetics are inherited characteristics. So weather best represents an environmental determinant of disease among the options.