What type of study design classifies subjects according to their exposure to a factor of interest and then observes them over time to document the occurrence of new cases of disease or other health events?

Sam is a four-year-old child. as compared to other boys of his age, his skin looks dull. his hair appears damaged and dry. which nutrient is sam’s body likely lacking? a. proteins b. carbohydrates c. fats d. minerals

List all these first to last . will markbr />

How could a person communicate directly with leaders about community health issues