<unk>  is rare and has been described all over the world. The number of new cases per year is estimated to be 1.6 per 1,000,000 population. The number of people currently affected is estimated at 1.5 cases per 100,000–1,000,000 population.<unk>  is most common in two age ranges, between ages 16–25 and between ages of 36–46 years.
Adult-onset Still's disease
Boutonneuse fever
Far East scarlet-like fever
Barcoo fever
Tomato fever
Haverhill fever
Murine typhus
Quartan fever