As soon as all cases are detected and isolated, it can be eased off, as is happening in China. Since South Korea never allowed Covid-19 to run outa control, she never went into a panicked lockdown. Hong Kong, Singapore and Taiwan of course stopped the virus from ever gaining a foothold (as S.K. probably would've if it hadn't been for that godforsaken church).
That the West ever let it get this far is bad enough, but talk of indefinite lockdowns is unreal. We have concrete demonstrations of why they're unnecessary even without a vaccine. If we junk the mathematical models and patiently follow the excellent examples from Asia, we can get it under control and get things running again. The W.H.O. is screaming at us to test, test, test, every suspected case, every contact. We didn't listen early enough, leading to thousands of needless deaths, but we can listen now, and turn things around.