6Frasch CE, Zollinger WD, Poolman JT. Serotype antigens of Neis- seria meningitidis and a proposed scheme for designation of sero- types[J]. Rev Infect Dis, 1985, 7 (4) : 504-510.
7WHO. Meningococcal vaccines WHO position paper November 2011[J]. WER, 2011, 86(47):521-539.
8Raghunathan Pratima L, Bernhardt Scott A, Rosenstein Nancy E. Opportunities for Control of Meningococcal Disease in The United States[J]. Annum Review of Medicine, 2004, 55:333-353.
9Marco AP SOfadi, E David G Mclntosh. Epidemiology and preven- tion of meningococcal disease : a critical appraisal of vaccine policies [J]. Expert Rev. Vaccines, 2011, 10(12) :1717-1730.
10Winder-Smitha, Barkhan TMS, Ravindrans, et al. Persistence of W135 Neisseria Meningitidis Carriage in Returning Hajj Pilgrims: Risk for Early and Late Transmission to Household Contacts[ J ]. E- merging Inf Dis, 2003,9( 1 ) :123.
