Weeelll, she was actually correct and most eggs did carry a variety of bacteria, the eggs are created complete with a load of bacteria courtesy of the hen. Most commercial chickens now are vaccinated and so their eggs are much less likely to carry bugs. Having said that, the people who seem to suffer from most stomach upsets are those who are so paranoid about food hygiene that they rarely encounter the bugs and so have no resistance whatsoever. Those of us who keep our kitchens reasonably clean but don't fuss around trying to sterilise everything rarely suffer more than a minor upset when we eat out.