Vaccinations I'm sure she is wrong.. Whilst modern methods of production may and do produce harmfull vaccinations, the principle behind natural immunity, and artificially handed on.. Well proven. People who got harmless cowpox, never got smallpox.. end story.. The problem is does our interference with natural selection, where the weak die, produce a long line of weaklings susceptable to all sorts of new deseases.. when I was a kid, the philosophy was to let the baby eat dirt.. He built up immunity.. Philip.