Assuming your asking the question given China not being able to suppress the spread of the virus outside their borders...
You can point to Hong Kong, South Korea, Taiwan as maybe a best case scenario.
They are by no means in the clear. And are fearful of a 2nd wave if there becomes complacency. They very aggressively tested their population to slow the outbreak.
Because all you can do is buy time.
One big problem for those countries, is you have countries like ours that will become virus exporters. China is putting people in 2 week quarantine when entering the country, even if you test negative with no symptoms.
Because ideally every country would have acted equally aggressive, so border closures wouldn't become common.
But you said perfect. So maybe federal support for programs to developing vaccines before the crisis. But that is a whole separate conversation. The issue of developing medicine that isn't expected to be commercially profitable, but is in the public interest to have. The type of stuff that would make a libertarian's skin crawl.
And I realize you asked for death counts and confirmed cases. But experts put in a lot of work to create those models. But no one is creating models for a "perfect" situation that never happened because we sat on our hands for 3 months.