From the (boneheaded) editor: My apologies. I pooched this one in a way that is exceptional, even for me. I humbly beg your forgiveness. The line for torches is on the left, and pitchforks is on the right. Please, move on to the next story and don't waste any further time on this one.
Regards,
cmn32480
(Score: 1, Insightful) by Anonymous Coward on Tuesday March 15 2016, @01:05PM
Most funnily, transmission of the weakened live vaccines to people no vaccinated actually means they will get the immunity (not as reliably, but with a certain chance). So that case is more "works better than expected".
There were cases of oral live vaccination with polio, where contact with the feces of the people vaccinated could infect you with the real thing.
But that was mostly translated into "oral vaccination is a really bad idea", also because you need so much that it increases the risk of some becoming live again.