Subject(s): Epidemiologic Factors -- Community Health Services. -- Public health -- Social surveys. -- Health Care -- First steps of community assessment : Need for assessment, working with community leaders -- Basic demographics : Population density, fertility rate and family composition, socioeconomic indicators -- Water and sanitation : Water quality, water quantity, human waste disposal, disease transmission by water contact, water related diseases -- Food- preparation and nutrition : Maternal effects on child nutrition, child nutrition, food availability- family level, cooking facility and cooking methods, food selection -- Food- agriculture : Food source and food availability, factors limiting crop yield- seed variety, irrigation, fertilizer use, land management, harvesting and storage -- Identification of community resources : People- leaders, skilled workers, literate people, community members, traditional healers, raw materials- building materials, transportation methods- cars and trucks, human powered transportation, animal powered transportation, water transportation, alternative energy sources - human and animals, electricity and fossil fuels, natural energy sources, monetary and material resources, outside resources- money, personnel, books and educational materials -- Health, health care and endemic diseases : Health care availability, barriers to health care, health facility services, essential medicines, vertical programs, at-risk groups- women, children, elderly, common and endemic diseases- disease prevalence and identification, detection of onchocerciasis, night blindness- screening tool for xerophthalmia, hematuria and proteinuria as an indicator of schistosomiasis, estimating malaria prevalence -- Rapid epidemiological assessment : Cluster sampling, verbal autopsy, estimating maternal mortality by sisterhood method, questionnaires aimed at key informants, REA summary