I don't think you understand how this works.
The physician team overseeing Senator McCain's care will be the team that advises him on his treatment. They will likely advise him on whatever treatment they think is the flavor of the month for them. Given that they were not a treatment site for DCVax-L, it's very possible they will advise McCain not to opt for DCVax-L. And he will likely listen to them.
And so, it is very important that one get the message in front of McCain, his family, and those that care about him as well. Let them know there is an alternative worth considering.
Every little bit helps. It's better than simply sitting around and doing nothing but complain about it on this board like you.