When my Dad was in the Navy during WWII his ship was in port next a British ship. He and his buddies went aboard to look it over and they were shocked to find that it was filthy. When one of our sailors commented about it a Brit sailor replied, "We're a fighting Navy not a clean Navy."
I'm glad to be ten generations removed from that and will fight to stay that way.
Babies in distress before delivery can inhale meconium ( basically their own stool excreted into amniotic fluid) and develop serious internal infection