Meningococcal Meningitis Information
Meningococcal meningitis occurs globally. It shows an endemic pattern in temperate climates, causing a steady number of sporadic cases or small clusters with seasonal increase in the winter period. Some endemic countries have reported an increasing annual number of cases over the last decade. A different pattern, with epidemics recurring during 2-3 consecutive years has been observed in other parts of the world. Countries in sub-Sahara Africa have experienced large outbreaks every 8-12 years in the past, but intervals between major epidemics have become shorter and more irregular since the beginning of the 1980s.