One of my former neighbours grew up to be drinking only bottled water. A point came when they had to travel to the village for vacay. While in the village; he followed other kids to play in the stream - and also joined other kids to drink the water from the stream.

Soon after, he developed serious diarrhoea as a result of that; but other kids were relatively unaffected by the water. Do you know what is remotely responsible for this? Other kids are used to the water and their immune system have become stronger and have built a form of defence against such attacks, but the story wasn't the same for my neighbour.

Real question; do you think we're actually physically stronger than our ancestors? When you have time, you can read this post

Thanks for dropping by