By bugs, I'm talking bacteria. The ones swarming in our guts (and apologies to everyone trying to eat while reading).
Quick article referencing to a study that rich world children have a lesser range (and less effective mix?) of gut bacteria than poor world kids. Clean, processed diet apparently has some disadvantages.
Call me cynical, but I'm sure the upshot will be another product for conscientious parents to buy to "rebalance" their kids' bacteria. Would laugh myself silly if someone packaged dirt with instructions to, "rub over hands before dinner". I shouldn't be so cynical. It's worth remembering that the clean rich world has a much higher child survival rate. The survival of the poor world children might skew the data of the study in another way just by them being the "tough" survivors.