Now that we have an idea of how the immune system works we can begin to use it to our advantage.

Vaccinations are an extremely important part of immunology.

Essentially a dead virus, part of a virus or extremely similar (but weaker) virus is injected into the individual.

This stimulates an immune response.

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Vaccinations

Animals have antigens across the surface of their cells. Some are shared across a species while others are unique to the individual.

So when a foreign organ is transplanted into another organism, there is often an immune response.

This is why  it is important to get an extremely close match between the donor and recipient.

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Bacteria have been around for billions of years. Its because of their ability to mutate and replicate that they have been able to adapt and survive to all of natures attacks.

However with the development of modern medicine, has come an eruption of medication, and thus drug resistant microbes or super bugs.  

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AIDS is an extremely painful and deadly syndrome. Although we can not cure AIDS, however we can manage it.

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