2. Typhoid Fever
This type of fever (thriving in areas with high population and low sanitation) is usually visually identified by many red spots on the chest area, as well as trouble breathing. It is known as a life-threatening disease, meaning the quicker it is treated, the better. Left unattended it can also cause you to become delirious.
The televised science show, NOVA (on PBS), said that typhoid fever has a rather interesting smell that you probably wouldn’t link to someone who is very ill. And that odor is freshly baked brown bread. So if you smell like you just came out of the bakery, it could be something a lot less pleasant.