I tend to think it's the other around. I think we have been too clean, with mothers, and fathers not letting kids be kids. I grew up playing in the dirt, probably ingesting quite a bit of it as I played. I think it's wise to wash your hands, cover your coughs and sneezes etc, but we have been way overusing all these anti bacterial products for years, and now as a society we are paying the price for it, not allowing us to develop herd immunity for these viruses.