I find it hard to think that man hasn't heard of how cancer works considering how common and deadly it is. He could just google it, there are so many sources. That's kind of frightening.
Maybe (trying to give him the benefit of the doubt) he's thinking of HPV, which can cause cancers (cervical, vaginal, penile, rectal, and oral/throat/tongue/tonsils), so you could "catch" cancer from transmission of it, or the potential and reported cases of cancer transmission from a living organ donor, but if he's not remembering all the information he might be incorrectly thinking just a general transmission is possible?
Since she is not going to date him, she should have assured him that cancer was highly contagious so he can go on looking like a dumbass in the future as well.
Sure, that's over the line.
But the guy wanted to talk to a professional instead of just believe what someone said.
Replace cancer with vaccines, and we'd hail the guy as a hero.
No, I'd still think him an idiot for not trusting what pretty much the entirety of the medical community says; and those that don't have been paid off, have a point to prove, or are being misrepresented for examining something similar or attempting to dispel the myth set up by a doctor essentially professionally unpersoned for being the first two kinds of people. Not to mention that he was performing spinal taps and other unnecessarily invasive procedures on quite literally disabled children during this experiment that proved nothing other than that a) he's a shitbag and b) there's a group of people that will latch onto the potential dangers even if every other study backed by proper science has shown no evidence of said dangers.
I don't think there's anything wrong with wanting to talk to a doctor about something you don't understand.
But the guy wanted to talk to a professional instead of just believe what someone said.
Replace cancer with vaccines, and we'd hail the guy as a hero.