Vaccine prevents meningitis A in Africa

Researchers at the London School of Hygiene & Tropical Medicine and colleagues reported data from a surveillance study showing a single dose of the MenAfriVac meningitis A vaccine given to about 1.8 million subjects during a vaccination campaign in three regions of Chad in December 2011 significantly reduced the incidence of all cases of meningitis by 94% compared with regions without mass vaccination (2.48 vs. 43.8 cases per 100,000 subjects, p<0.0001). Additionally, there were no identified cases of serogroup A meningococcal meningitis in the three vaccinated regions. Data were published in The Lancet. ...