8. Mumps
Despite what may be a playful-sounding name that could be used as a name for an animated movie character, mumps is a serious disease that can lead to inflammation of the brain that could be fatal. Mumps is extremely contagious and can be passed from person to person via casual contact. Swelling in the area of the cheeks and jaw are telltale signs of this viral infection for which antibiotics are of no use.