<span>Shedding is a cat's natural process of losing dead hair.</span>
AIDS is the most severe phase of HIV infection, when a person’s immune system is severely weakened. When HIV weakens the immune system opportunistic infections occur in the body. The low number of helper T cells in the blood and the badly damaged immune systems leads the infected to get an increasing number of severe illnesses, called opportunistic illnesses. Opportunistic infections are infections caused by pathogens that take advantage of an opportunity not normally available.
I would say something that makes you use the spinal cord the most (if you catch my drift)...
Only one sperm cell makes it to the ovum
