[Epidemiological surveillance and its role in immunization programs].
D003140:Communicable Disease Control; D004812:Epidemiologic Methods; D006801:Humans; D007114:Immunization; D007390:International Agencies; D007391:International Cooperation; D008722:Methods; D011314:Preventive Health Services; D012189:Retrospective Studies
La vigilancia epidemiológica y su papel en los programas de inmunización.