Had the victims been vaccinated against polio?
Pretty safely assuming not, if you couldn't get to them with a needle and syringe to give a vaccination shot despite repeated efforts, what are your chances of getting them onto a sewerage system?

Probably more remote than getting them onto a fixed line telephone (which admittedly is an abstract thought to file away for now).

Dave, If this is the question you refer to, then I apologise for not replying sooner. truth is it is not easy to verify this fact without using unreliable sources that cannot be cross referenced. I've read that the one side blames vaccines for the epidemics and the other side blames the un-vaccinated. I could not reply with any confidence, but will make any new developments known as soon as I am aware of them.