https://www.usatoday.com/story/news/health/2020/11/19/covid-19-vaccines-who-gets-coronavirus-immunization-first/3778098001/
Hi Folks,
I sort of got a brainstorm after reading the article above on Friday night. The key graph from the article is the U.S. phased rollout:

My thought was you could possibly make a kind of ‘clock’. So the attached data table assumes a uniform rollout of vaccine to the population of the U.S. starting 01 January 2021 and ending 31 December 2021. This is a possibly dubious assumption, but you get some interesting graphs and a possible way to play the game of ‘when do I get vaccinated’? You can also speculate when ‘herd immunity’ might be a reality in the U.S. . The attached table has a little bit of time arithmetic in it. There are a few graphs to look at too.

Wishing you in the U.S. a great and safe holiday.
16FEB2021
Returning to this to check my original estimates. Looks like my original estimate was pretty optimistic. On 16 February 2021, the U.S. is at 15,000,000 people who have received two doses. Most states are in phase 1b.