👉 Typhus is a type of viral infection characterized by fever, chills, and malaise. It's often caused by the bacteria Mycobacterium tuberculosis, which can also be transmitted through contaminated food or water. Symptoms typically start 1-2 weeks after exposure to the bacterium, but some cases may occur even earlier. Typhoid is a more severe form of typhus that involves diarrhea, abdominal cramps, and fever.