It depends on what you mean by corona?
The actual virus, it'll be here until a proper vaccine or treatment is made.
The restrictions?
April is going to be crazy, but we're going to hit our curve by the second week or so. dikkhead finally called a DPA, so damn near everyone is making masks, vents, beds, which is honestly the most important part. I see mid May - June being where they start lifting restrictions, as testing becomes quicker and accurate. Remember, the point of the lockdown is to slow the spread. They still expect most people to eventually get it, but they don't want to overwhelm hospitals. Once testing is quicker and accurate and treatments start popping up (Should be April-May), it'll be easier to isolate people like SK did.
Still, I think it's over for beaches, pools and Water parks this summer. If they do open. we'd really have to be below the curve. I guess that could be around August or so, if we're lucky.