Infection

Infection, a fundamental aspect of medicine and human health, represents the complex interaction between microorganisms and the human body. From bacteria to viruses, fungi, and parasites, infectious agents can cause a wide range of diseases, some of which have shaped the course of human history. Infections are any illness or condition caused by bacterial growth or poisons (toxins). You can get sick from getting harmful bacteria in your skin, gut (GI tract), lungs, heart, brain, blood or anywhere else in your body. The germs may be bacteria, viruses, yeast, fungi, or other microorganisms. Infections can begin anywhere in the body and may spread all through it. An infection can cause fever and other health problems, depending on where it occurs in the body.