CNN: Current rate of US vaccinations would take until Summer 2022 to complete for all adults, Spring 2022 if improves to 100mil in 100 days Jan 22, 07:24
Though you don't need (and never will) get to 100%, 85% would be enough and that may still be possible in 2021. {nm} Jan 22, 07:25
This is also based on just the two current vaccines available, with more viable vaccines that improves as well. {nm} Jan 22, 07:26