title: World problems in viral vaccines.
mesh_terms: D003140:Communicable Disease Control; D003153:Community Health Services; D003906:Developing Countries; D004196:Disease Outbreaks; D004355:Drug Stability; D004356:Drug Storage; D006280:Health Workforce; D006801:Humans; D008457:Measles / Q000401:mortality; D011051:Poliomyelitis / Q000453:epidemiology; D012141:Respiratory Tract Infections / Q000453:epidemiology; D014329:Tropical Climate; D014611:Vaccination; D014612:Vaccines / Q000592:standards; D014765:Viral Vaccines; D014944:World Health Organization
chemical_list: D014612:Vaccines; D014765:Viral Vaccines