system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Where did the wizarding world think that Harry went after Voldemort tried to kill him?

I know why he had to live with the Dursleys, but what did the rest of the world think? Wouldn't they question how and why the most famous wizard child ever suddenly disappeared? Or was his stay with the Dursleys and the reasoning behind it widely known?

What would the average witch or wizard know about all this?
gpt
That he went to live with his muggle relatives,  In PS when Ron and Harry meet Ron ask Harry if its true that he went to live with his muggle relatives.  So it was  common knowledge that Harry went to live with family but who and where exactly was a guarded secret.