Tim Friede from Wisconsin has voluntarily endured over 200 snake bites and 650 venom injections over two decades to build immunity and aid scientific research. His unique resistance inspired scientists to develop a potential universal antivenom using his blood. A study published in Cell confirmed success in mice. The antivenom worked against venom from 13 out of 19 snake species. Researchers now plan animal trials in Australia. Friede, now working at biotech firm Centivax, says he’s proud of his role in saving lives.