1. The global value of vaccination;Ehreth;Vaccine,2003
2. State of the world's vaccines and immunization;WHO,2009
3. WHO vaccine-preventable diseases: monitoring system – 2010 global summary;WHO,2010
4. Immunization coverage with measles containing vaccines in infants, 2012;WHO,2013
5. WHO position on measles vaccines;WHO;Vaccine,2009