13 (miliary fever): Maladie éruptive, aussi appelé << suette miliaire >>, souvent mortelle, comme lors de la grave épidémie de 1821, date correspondant en effet à la maladie prétendue de Cosette.
[This gets translated as “military fever” by MacAfee and Fahnestock and it isn't.] Eruptive sickness, also called “miliary sweating disease” [miliaria], often fatal, as during the serious epidemic of 1821, date corresponding in effect to Cosette's claimed illness. [Miliary fever (scroll down) is sometimes a catch all for any disease with a high fever and a rash of small red pustules. It's the cause of death on Mozart's death certificate. There was an outbreak of “suette de Picardie” in 1821 in Seine-et-Oise.
The French text is "Une fièvre miliaire," not "une fievre militaire" (which would have been "military fever" and therefore typhus). Here's wiki for miliary fever which is now a disused term. Here's a late-nineteenth century description of it.