We wouldn't take a vaccine from Bill Gates: a man whose polio vaccine actually causes polio. Besides, he's not a philanthropist, he's a blatant psychopath, and shame on any dimwit who can't see that. If philahtropists like Gates really wanted to help the third world, they'd use a tiny portion of their billions that would actually see results: like introduce running water and such sanitary measures. Plumbers save more lives than doctors! Most places don't need vaccines, they just need proper running water and sewage.