Immune System

Germ Theory: 101

Why do some people always catch a cold, and others don’t?
Viruses, germs, and bacteria are everywhere. They are in the food we eat, the air we breathe and the water we drink, but not all of them are bad or harmful.

Think of the immune system as your body’s security detail. The cells, tissues, and organs that comprise it help repel foreign invaders like harmful bacteria, parasites and other microbes that can cause infections. Disorders of the immune system range from everyday annoyances like mild seasonal allergies to serious illnesses like leukemia. Stress, lack of sleep and other common conditions can contribute to a weakened immune system, which can make you vulnerable to infections. continue reading »