Before revision:  The suggested polices can also be used to augment and compliment other post lock-down strategiesto provide additional levels of robustness in the post lock-down period .
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. 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 mitigation strategy. These methods can act alone, or can be used in combination with other mitigation strategies, to augment and compliment other post lock-down strategiesto provide additional levels of robustness in the post lock-down period .