Zombie blood in 28 Days Later doesn't count
January 5, 2017 6:23 PM Subscribe
I was joking with a friend about how we should postpone our blood pact because he has a cold, and we realized neither of us really knows if that even makes medical sense. Could you realistically pass on a cold via an ill-timed super-swearsies? Are there any surprising or lesser known "totally can!" or "totally can't!" illnesses in that category? Interesting underlying blood mechanisms?