What if not enough Americans are vaccinated to end the pandemic?

What are the chances that not enough Americans will be vaccinated to reach that 80% goal to end the pandemic of COVID-19 to get our lives back to normal? Also, what if the supply, and demand of Pfizer, Moderna, and Johnson & Johnson does not rollout fast enough to get enough people vaccinated or inoculated anytime real soon if ever? What if the variants go wild so our lives will seemingly never return to normal? We’ve got problems! Then what happens next if we don’t reach 80% herd immunity?

?2021-03-10T19:59:31Z

The vaccine supply has greatly increased, and there's enough to get everyone vaccinated by May. The problem is not vaccine supply- it's the unwillingness of people to get it. Some are being influenced by Russian propaganda, which is designed to get us to reject the vaccines we have and buy the Russian one instead. Yes, there will probably still be COVID cases among those who don't get vaccinated. But the numbers of new cases are already way down, and after most people get vaccinated, there may be few enough new cases that we can get back to a more normal life. 

Jesus2021-03-10T19:10:51Z

The coronavirus will continue to spread amongst those that haven't already had the illness it's not necessary to give vaccines to those people that have already had it that's the best vaccine that you can possibly get to have the disease and survive it. But for those people that don't get vaccinated they're still going to be the ones that are the targets of the disease.

A Hunch2021-03-10T17:21:25Z

You should read the article in the Wall Street Journal written by Dr Martin Makary from February (or follow his twitter).
- He is a surgeon at Johns Hopkins University and was a recommendee for Surgeon General under Obama... i.e. not a quack.

He discusses the road to herd immunity and we don't get there solely by vaccinations.  His theory is based on the T & B cell changes caused by covid.  These are memory cell changes.  They are no exclusive to covid.  Every covid patient has these changed.  But they have existed in since at least 2014.
- The J&J vaccine creates these changes, the Pfizer & Moderna vaccines do not.

Jimmy C2021-03-10T15:00:41Z

If we do not have enough people vaccinated the virus continues to spread. The problem is that as it spreads it mutates and becomes resistant to the vaccine. By next year we have new more deadly forms so we have to start all over again with a new vaccine. 
That is why it is vital to get everyone immunised this year to stamp out covid. We could do it also if everyone got sensible and wore masks, but unfortunately not enough people have the common sense to survive. I read that there is some huge motorbike rally in the US somewhere soon.That will spread the disease and kill a lot more people. 
Common sense and masks plus vaccine would eradicate the disease.