Mexico introduces pentavalent vaccine.
D000293:Adolescent; D000367:Age Factors; D000569:Americas; D002648:Child; D003695:Delivery of Health Care; D003710:Demography; D003906:Developing Countries; D004194:Disease; D006262:Health; D006296:Health Services; D007114:Immunization; D007843:Latin America; D008800:Mexico; D009313:National Health Programs; D009656:North America; D011153:Population; D011154:Population Characteristics; D011320:Primary Health Care; D014612:Vaccines; D014777:Virus Diseases
D014612:Vaccines
Age Factors; Americas; Child; Delivery Of Health Care; Demographic Factors; Developing Countries; Diseases; Health; Health Services; Immunization; Latin America; Mexico; National Health Services; North America; Population; Population Characteristics; Primary Health Care; Vaccines; Viral Diseases--prevention and control; Youth