It stops when:
1) Everyone who wants a vaccine can get one (while some areas are seeing drops in appointments, other areas are still constrained and it takes about 5-6 weeks after the first dose to get fully vaccinated so we're probably looking at mid-June before that is the case)
2) Herd immunity reaches ~70%
3) Evidence that cases are dropping consistently for 2-3 weeks following reaching herd immunity to ensure that is the correct number (because no one actually knows if 70% is the magical number or if needs to be closer to 80%)
4) Further studies are done to understand how long antibodies exist
5) Further studies are done to understand transmission from those who are fully vaccinated
A lot of this is able to be done in parallel, but we're closer to the reality of returning back to normal than not.
It also stops when:
-Advisory bodies like the CDC and WHO release definitive changes to their recommendations, a process that is driven by constant review of data but is subject to delays in interpreting and coordinating messaging of that data.
-The message has a chance to filter down through the various political system layers. At the local and state levels changes may need to wait until their own reviews / meetings / processes play out.
-Major national and international business (like TWDC) drop restrictions. Even after new guidance is issued, they may have to balance different operating restrictions and considerations across their a large geographic footprint while also waiting for potential changes to clear their internal legal and risk management teams.
-International travel and trade to fully recover from the unprecedented disruption of the last year, a process that may take years in itself. There are still significant supply line challenges, now most apparent in electronics / chip supplies.
In short, even when we hit these magic numbers, there’s still a whole lot of red tape and sausage that needs to be made before ‘normal’ happens.
I currently work (from home) for a major national company that doesn’t own a theme park. I’m still getting email messages weekly informing me of employees at my (reduceoffice location testing positive. We’re still a seemingly long way from ending work-from-home, dropping corporate mask guidelines, and reinstating non-essential travel. My immediate leadership has a plan, but they can’t roll with it until the go-ahead from countless other internal groups and higher ups. I can only imagine every large company you can name is going through the same process and uncertainty, and you can be assured that they are not going to jump the gun on this.
I’m not saying that’s right, that it agrees with the science or not, or that it agrees with your preferred political position or beliefs in personal freedom... It is what it is, and it’s the reason you may well see places like WDW and other large companies require mitigation well beyond when you may think they should.