Researchers are discovering that the immune system of crocodiles, which is known to be more robust and effective than the human immune system, may help us find a means of attacking and killing the HIV virus in humans. The immune system of crocs are able to deal with limb loss and massive skin tears because, well, crocs fight and stuff. Their immune system lets them heal up even in microbe-infested waters and muck.
Researchers have found that the immune system is capable of killing the HIV virus much more effectively than ours. In fact it is also capable of killing bacterial strains that are antibiotic-resistant.
So we know that the croc system can kick some serious microbe butt, but the trick is to figure out how to use these antibodies without having them kill their human hosts. More research needs to be done, but the findings so far are pretty interesting.