| 摘要 |
The invention provides an immunogenic composition comprising capsular saccharides from: a) at least serogroups A and C of N.meningitidis, wherein the ratio (w/w) of MenA saccharide:MenC saccharide is greater than 1; and/or b) serogroup Y and one or both of serogroups C and W135, wherein the ratio (w/w) of MenY saccharide:MenW135 saccharide is greater than 1 and/or the ratio (w/w) of MenY saccharide:MenC saccharide is less than 1. |
