3Piso B,Wild C.Decision support in vaccination policies[J].Vaccine,2009,27(43):5923-5928.
4World Health Organization.Vaccine Introduction Guidelines-Adding a vaccine to a national immunization programme:decisionand implementation[M].Geneva:WHO,2005.
5World Health Organizaiton.Vaccine Position Papers[EB/OL].[2014-05-09]http://www.who.int/immunization/documents/positionpapers/ en/.
7Marchelti F,Morelli P.Measuring public health officers,opinionson new vaccination programs by means of the WHO VaccineIntroduction Guidelines[J].Hum Vaccin,2009,5(9):640-644.
8Samaan G,McPherson M,Partridge J.A review of the evidence tosupport influenza vaccine introduction in countries and areas ofWHO^ Western Pacific Region[J].PLoS One,2013,8(7):e70003.
9World Health Organizaiton.Global leaders support new six-yearplan to deliver a polio-free world by 2018[EB/OL].[2014-05-09].http:// www.who.int/mediacentre/news/releases/2013/polio_six_year_plan_20130425/en/.
10He H,Chen E,Chen H,et al.Similar immunogenicity of measles-mumps-rubella(MMR)vaccine administrated at 8 months versus12 months age in children[J].Vaccine,2014,32(31); 4001-4005.
