Before revision:  Furthermore, these policies, while not eliminating the virus , can nevertheless be sustained over long periods of time, until a vaccine or treatment becomes available . The robustness of these policies stems from the fact that they are open loop methods; namely, lock-down periods are not triggered by measurements -- inevitably uncertain and delayed -- over short time scales such as hospital admissions, but rather are driven by predictable, high-frequency, periodic triggers in- and out- of lock-down. A slow and inherently robust outer supervisory feedback loop, based on measurements  over longer time scales , is used to tune the parameters of the mitigationstrategy.
After revision:  Furthermore, these policies, while not eliminating the virus , can nevertheless be sustained over long periods of time, until a vaccine or treatment becomes available , while alleviating the social costs associated with long lockdowns. Typically, the policy might be in the form of 1-day of work followed by 6-days of lockdown every week (or perhaps 2 days working, 5 days off) and it can be modified at a slow-rate based on measurements over longer time scales , is used to tune the parameters of the mitigationstrategy.