What is an example of repression other than child abuse?

Explanation:

For example, an adult male was bitten by a dog when he was a little boy. He developed a phobia, without knowing what was going on.

Later, as he was growing up, he didn't know why he was afraid of dogs so much. He cannot remember when or how he developed a phobia, because he repressed that stressful event in their life.

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.