There are interesting studies being done about the effect of cesarean (non-vaginal) birth is having on babies not picking up a lot of the bacteria from the moth

There are interesting studies being done about the effect of cesarean (non-vaginal) birth is having on babies not picking up a lot of the bacteria from the mother. I know soap marketing has convinced us all that bacteria is evil, but apparently some bacteria is essential for humans (and animals, insects, etc..) being able to process certain foods. Some bacteria is bad, some is bad in high quantities, and some is essential to digestion and/or virus control. If this is true, I would expect countries with higher cesarean birth rates to also have more allergies (though that wouldn't have to be the only reason).