@ Dr. Edd
I should add that of course hermetically sealed batches of Tetanus vaccine tested negative, the manufacturers are hardly going to supply laced vaccines for testing, are they?
And interestingly, in one of your links, it said how the vaccines were only allowed to be given by government agents, and that they arrived with police escorts, and took any unused vaccines back with them. With the vast health facilities the Church has in Kenya, they are obviously perfectly capable of administering vaccines, and I imagine generally do – that is one of the things I shall ask, when I manage to make some decent contact with them.