Did Nostradamus Really Cure the Plague?

Nostradamus is reputed to have cured the plague in multiple cities, including Marseilles, Aix-en-Provence, and Lyon with a remedy known as a "rose pill."  Nostradamus has given us the recipe, which includes such things as cypress sawdust, sweet calamus, iris of Florence, cloves, and hundreds of red rose petals--a concoction which almost certainly would not have cured anything.  However, his success seems to have been reported generously by villagers in several cities.  This leads one to postulate that Nostradamus may have accidentally cured plague victims with such simple strategies as clean drinking water, healthy diet, elimination of garbage, removal of soiled bed linens, and isolation of victims.  Because the disease was largely spread by rats, drawn to garbage and filth, any cleanliness strategies would certainly have helped reduce the likelihood of spreading the disease through rodents.  Ironically, Nostradamus' first wife Henriette and two children died of disease--probably the plague--while Nostradamus was wandering around the countryside trying to cure plague victims.