Meningococcal disease occurs in epidemics in areas where many people live together for the first time, such as army barracks during mobilization, college campuses and the annual Hajj pilgrimage.
Epidemik penyakit meningokokus terjadi di daerah-daerah di mana orang tinggal bersama untuk pertama kalinya, seperti barak tentara selama mobilisasi, kampus perguruan tinggi dan ziarah Haji tahunan.