Even if R_t is at or just above 1, that still lets us have a slow upwards curve with repeated short lockdowns. The Oxford paper found that given the characteri

Even if R_t is at or just above 1, that still lets us have a slow upwards curve with repeated short lockdowns. The Oxford paper found that given the characteristics of SARS-CoV-2, 60% of people leaving the house would need to use an app like this (not 60% of the whole population). But that is an evaluation of a single measure: phone contact tracing followed by prompt isolation of contacts. If you combine that with other potential measures such as continued closure of high risk environments, potentially public mask wearing, etc. you might be able to get away with less than 60%.