Recurrent episodes of fever with less severe symptoms occur after about a week. In untreated infections, fevers recur about three times in TBRF, and only once or twice in LBRF.
In louse-borne relapsing fever (LBRF), lice acquire Borrelia from humans who are already infected. These lice can then go on to infect other humans. LBRF is said to be epidemic
It's not the "fever" part that gives Scarlet Fever it's name it's the rash and the red (scarlet) face that comes with it. Obviously you can have a fever with Scarlet fever...but not always.improved...