The warm chain.
D000569:Americas; D001208:Asia; D001210:Asia, Southeastern; D002681:China; D003695:Delivery of Health Care; D019049:Developed Countries; D003906:Developing Countries; D005060:Europe; D005202:Asia, Eastern; D006262:Health; D006296:Health Services; D007114:Immunization; D010679:Philippines; D011320:Primary Health Care; D013020:South America; D013030:Spain; D014611:Vaccination
Americas; Asia; China; Delivery Of Health Care; Developed Countries; Developing Countries; Eastern Asia; Europe; Health; Health Services; Immunization; Mediterranean Countries; Philippines; Primary Health Care; South America; Southeastern Asia; Southern Europe; Spain; Vaccination--history