One hundred and forty three million pounds of beef was put on hold at the end of January as the U.S. Department of Agriculture decided what to do about it. In the end, they recalled it. That’s not before countless numbers of Americans were already exposed to the potentially harmful meat, however, in the form of hamburgers, sloppy joes and school lunches.

Explanation and Causes:
Heat stroke sets in after a less serious illness called heat exhaustion. Because heat exhaustion is a precursor to heat stroke, it should be taken just as seriously. Heat stroke happens as a result of the body not being able to cool itself through its regular mechanisms of sweating [...]

Explanation and Causes:
Gangrene is a condition that is characterized by the death of an organ or body tissue. It is a very serious condition that requires immediate medical attention.
There are 3 types of Gangrene:

Dry Gangrene
Wet Gangrene
Gas Gangrene

All three of these can be caused by:

Serious injury
Diabetes
Blood vessel disease such arteriosclerosis
Surgery
Infection

Symptoms:
General symptoms [...]