Well, if you live in a house built before 1978 it could have some harmful effects on your child due to lead poisoning.
Lead poisoning becomes poisonous when the paint cracks, chips or peels.
Elevated levels of lead are most dangerous to children under the age of six. Children who have high levels of lead get it from breathing or swallowing lead dust or from eating soil or paint chips that contain lead. Babies are at risk more because they are always sticking their hands or objects into their mouths and these may have lead specks on them. Also every time a window or door is opened with paint, friction along the sides create a fine dust that can spread all around the house. If lead builds up in the body it inhibits cell function which can cause damage to kidneys, nerves and red blood cells.