About 70% of cases of bacterial meningitis happen before 5.
In 30% of cases of meningitis due to meningococcus purpura fulminans appears.
In 60% of cases, the ill person does not have any aftermath once cured, 20% suffer from serious aftermath such as deafness, blindness, paralysis, coma... Unfortunately, as for the 20% remaining cases the disease leads the ill persons to death.
The outbreak of meningitis is seasonal (winter/spring) and affects from 1 to 5 individuals out of 100000 inhabitants in an industrialized country.
Up to 500000 cases of infections due to meningococcus are estimated each year worldwide.
Nowadays, about 1.2 millions of cases of bacterial meningitis (meningococcus, pneumococcus) are registered among which 135000 are fatal.
14% of cases of meningitis affect individuals who are less than 20. The majority of them are children who are less than 1.