And we know staph can do amazing things.

Protein A is a cell wall component produced by several strains of Staphylococcus aureus which binds to the Fc region of IgG.

The worst possibility is that a very simple germ, like staph, for which we have one antibiotic that still works, mutates.

That will know how to find Staph when it's in your body, and will alert your immune system to go after it.

A staph cell can be next to a muscle cell in your body and borrow genes from it when antibiotics come, and change and mutate.

The danger is that some germ like staph will be will mutate into something that's really virulent, very contagious, and will sweep through populations before we can do anything about it.

Drug resistant bacteria kills, even in top hospitals. But now tough infections like staph and anthrax may be in for a surprise. Nobel winning chemist Kary Mullis, who watched a friend die when powerful antibiotics failed, unveils a radical new cure that shows extraordinary promise.