I get the difficulty of this question. I also see that we need to give people an incentive to get vaxxed. I also think we can be more concrete about 'when we'll know'. It's more obvious than we think. We'll know when cases get super low. That's when we'll know. Pointing to ... https://twitter.com/CDCDirector/status/1385291454759714816

2/ percentages of vaccination seems like a mistake. If we have 80% vaccinated and tens of thousands of people are still getting covid every day we'll know 80% isn't high enough. We should keep wearing masks indoors unless we're only around other vaxxed people. We can ...

3/ be much looser outdoors, unless you're in a crowded situation. But again, when will we know we can really drop the precautions? I don't think it's that complicated. We'll know when the cases really stop dropping to a really low level and stay there.