So scientists grabbed some crocodile blood and started exposing it to different infections, including HIV (if you've ever met a crocodile with AIDS, that's some sad shit). What the researchers found was that while human blood could kill eight of the 23 strains of bacteria they attacked it with, alligator blood killed all 23, including antibiotic-resistant MRSA. From that point forward, the scientists renamed croc blood Muhammad Ali and human blood Screech Powers.
It turns out the crocodile's whole immune system is organized differently from ours. Instead of getting too technical about how it works, we'll let Australian scientist Adam Britton explain it: "The crocodile has an immune system which attaches to bacteria and tears it apart and it explodes." Fuck yes.
Here's an electron microscope shot of it in action.
So it is hoped that the croc blood proteins can be developed into drugs for humans (drugs that we hope will have pictures of crocodiles on the label), since those tests revealed that crocodile serum could explode lots of bacteria that plague humans, even those superbugs that are resistant to penicillin.
And yes, later tests showed it was also effective at killing HIV. There is a lot more testing to be done, so don't go crazy yet. It will take years just to make sure pumping a sick person full of crocodile blood doesn't turn them into Killer Croc.
Or if we have a say, ensure that it does.