Group C meningococcus vaccination in the southwest region of France

Between 1995 and 2000, the incidence of confirmed serogroup C invasive meningococcal infection (IMIC) in France, adjusted for undernotification, increased from 0.14 to 0.24 cases per 100 000 inhabitants. In 2001, the rate reached 0.40/100 000, which was attributable to an increase in the incidence of all invasive meningococcal infections (IMI), and also to the fact that the proportion of IMIC increased from 23% to 35% of all IMI(1).