To answer your question further about childhood illnesses: There are a variety of causes that I usually don't speak about. Shocks, conflicts etc. that occur during pregnancy affect both the mother and baby. Also any unresolved issues by ancestors affect the child.
I worked with a boy that had a heart murmur, allergy to milk and learning difficulties. This was traced to an incident during the 6th month. His mother had a nasty fight with a neighbor. Resolving the issue with both the mother and child, they cured themselves.
An other case, a mother did not want her daughter to bear a child out of wedlock. The unborn baby's grandmother said some very nasty things about him and wanted him aborted.
This child at 4 years developed leukemia. This brave child survived the disease and the horrid chemotherapy.