He died in Philadelphia on the 19th of April 1813, after a five days' illness from typhus fever.
Epidemics of typhus are not unknown, as well as ophthalmia.
After an attack of typhus he returned in 1809 to France, where he devoted himself to the study of the natural sciences.
In 1847 he began to act as Privatdozent in the university, and founded with Reinhardt the Archiv fiir pathologische Anatomie and Physiologic, which, after his collaborator's death in 1852, he carried on alone, and in 1848 he went as a member of a government commission to investigate an outbreak of typhus in upper Silesia.
The climate is mild and healthy, although serious epidemics of yellow fever and typhus have occurred.