What individual factors (personal characteristics, genetics, developmental stage of life, lifestyle) affect community/public health?

Every individual affects the community in some way. What individual factors (personal characteristics, genetics, developmental stage of life, lifestyle) affect community/public health? What can advocates, policymakers, and others do to promote habits that will improve community health.

Your responses should follow the conventions of Standard American English (correct grammar, punctuation, etc.). Your writing should be well ordered, logical, and unified, as well as original and insightful. Your work should display superior content, organization, style, and mechanics. Use APA style for all citations.