I have just been searching for Measles and the third link I tried gave me this useful advice
''FAQs (025)
The dictionary describes 'sin' as:
"transgression of God's law; the state of human nature in which the self is estranged from God; an offense against religious or moral law".
Notice sin is both an action and a state. We can commit sin by breaking the ten commandments, for example. But it is also the state of being estranged (separated) from God.
Measles spots It can be illustrated by an illness in which we get spots or a rash. The spots tell everyone that we have the illness but we had the illness even before the spots appeared. The spots are caused by the illness. So too with sin; when we commit sins (lie, steal, murder, hate, etc) we know that we are sinners, but we had the disease of sin (estrangement from God; rebellion towards God) even before we took a sinful action.
Jesus died to forgive us for our actions and to deal with the disease of sin in our lives. For more click on the link Why did Jesus die? in the right hand column.''