It seems for parents to make their baby is in a clean place. Most parents do their to keep dirt and bacteria away from their children. However, a scientist says dirt is to make babies . Dr Jack Gilbert studies bacteria. He did research into how dirt and affect children. He published his research in a called 'Dirt is Good: The Advantage of Germs for Your Child’s Developing Immune System'. He said: "It's to wash their hands if there's a…flu going around….but if a dog licks their , that's not a bad thing."
Dr Gilbert said letting children get was beneficial. The dirt helps small kids to build their system. Gilbert said children often get because parents try too hard to clean that children use. He said parents now sterilize in the home too much. This makes children's immune systems very sensitive, which can lead to like asthma and food allergies. Gilbert defended the "five-second ". That is when you eat something that fell on the for fewer than five . Gilbert says that is OK as long as the floor isn't dirty.
