Failure of live, oral virus vaccines in developing countries.
D003906:Developing Countries; D006801:Humans; D007231:Infant, Newborn; D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral; D012401:Rotavirus / Q000276:immunology*; D014611:Vaccination; D014765:Viral Vaccines
D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral; D014765:Viral Vaccines