AIDS is considered one of the highest health threats in the world today. Depending on where one stands relative to the poverty line, where one lives and what one's sexual orientation is, this threat is greater or lesser. Though where AIDS came from, the exact patient zero2, and many other questions about this virus's origin are still unanswered, the risk is blatantly obvious. The only way to protect one self is to be aware of the threat and to habitually use practices which lessen the risk of infection. There is no cure for AIDS, only prevention.

A Brief Explanation of the Human Immune System (Part One):

The human immune system works by always being prepared for an attack. There are two main cell types which help defend the body and maintain homeostasis3: the white blood cells, which can be divided into T-cells and B-cells. There are three types...