I'm trying to advocate all these different people, lots of hours on the phone. trying to get somebody on the phone saying, this was going to die. as soon as we sent the test, we said, how do we get the antidote? >> he wanted to get ready as soon as results came in. what is the antidote? >> so, the antidote is called oppression blue. >> you've probably seen impression blue in paint. yes, paint. it's been used as a pigment, since the 1700s. you can see it here, in vincent van gogh's starry night. it wasn't until 1965 that scientists discovered prussian blue could be uses antidote. it works by sp...