This document provides an introduction to medical sociology. It defines key concepts like sociology, society, group, community, role, culture, and social control mechanisms. Medical sociology studies the medical profession, relationship between medicine and the public, and role of social factors in disease. A society is a system of social relationships with compulsory membership and cooperation/conflict. Culture refers to learned behaviors acquired in a society through customs, beliefs and skills. Acculturation describes the diffusion of cultures with contact between groups. Social problems can threaten community welfare when affecting many individuals.