All of these outbreaks have tended to disproportionately affect women, and in time, when doctors failed to find the one cause of the disease, they thought that these outbreaks were mass hysteria.
Seluruh wabah ini cenderung lebih banyak menyerang perempuan. Seiring waktu, saat dokter kesulitan menemukan penyebab penyakit ini, mereka pikir wabah ini adalah histeria masal.