Clusters of meningococcal disease in educational establishments in the United Kingdom: April 2001 to March 2002.

Clusters of meningococcal disease in school and pre-school settings generate high levels of public anxiety. Thus, cluster detection and reporting is crucial to trigger prompt public health measures, and detailed study is essential to shape future public health policy. In 2001/02, most clusters were of group B meningococcal disease and most occurred in pre-school or secondary school settings. No clusters of group C meningococcal disease occurred in this time period.