It's not. But, as has already been stated, that only gets 25 million Americans vaccinated.
You have a crystal ball telling you that?
"The 10 Canadian COVID-19 vaccine efforts listed with WHO are unlikely to be ready by 2021":
https://www.thestar.com/business/20...that-doesnt-mean-canada-will-be-shut-out.html
Nobody knows when, or even if, that will happen. There are presently no proven effective vaccines. Nil. Nada. Zilch.
There never has yet been a proven effective vaccine for - any - of the coronaviruses of past years.
It's unknown how long people are immune from infection after being infected. Some have already been reinfected. It may be necessary to have an annual C-19 vaccination. Just like the flu.
Not according to your source:
"...“The one thing we were concerned about was that we have a lot of people in this country who may not want to get vaccinated right away,” Fauci said. “It may take well into the second or third quarters [of the year] to finally get people to be convinced to get vaccinated.”
Furthermore:
"Health experts have warned that if enough people
choose not to get a Covid-19 vaccine, it may keep the US from herd immunity against the coronavirus.
https://www.cnn.com/2020/10/05/health/covid-19-vaccine-willingness-cnn-poll-wellness/index.html