If it's drawn out slow enough, the spread should nearly stop without lockdown once 20-25 percent of the population has recovered. Assuming prior infection offers immunity of course.
I think it's a pretty safe prior to have that our immune system will work effectively against this virus post exposure. This isn't the first time a virus has crossed the species barrier in all of our evolutionary history and we've survived so far.
The article said the patient showed signs of recovery and then later on started showing signs of the virus again. I don't know if that means they conducted an exit test to confirm that she was negative for coronavirus after her first bout with it. Maybe it died down in her system, but wasn't completely gone when she was deemed healthy again and later on it flared up again for some reason.