I am very very interested to see the one dose scenario over time. If we want to be realistic let's get to the table and talk it out. I think that is always the answer.
1) With the vulnerable and/or people with pre-existing conditions... let's go 2 doses because that's what pfizer set it up as. Let's stay the course and not re-invent the wheel just yet until more data is out there. Once more data is out there, we can adjust if we need to.
2) With under 50 with no pre-existing conditions, fatality rate being less than .02, maybe we do the one dose scenario here. Let's give that a shot (pun intended) because these people are less vulnerable.
Now ultimately, I am one of the very few around here that stay consistent with my message. I say.. let the people choose. This would be more difficult to set up, but ideally we can have people sign off on just 1 vs. 2. We can go in with the expectation of two, but for someone who may be 30 and no pre-existing conditions.. they can say "I only want 1 and that is good for me." That opens up some vaccines.
Just putting thoughts out there. It isn't perfect but this is how science works. Once more data becomes available, WORK WITH PEOPLE and talk it out. Communicate. It's legit that simple.