What would happen next to our lives if not enough Americans are vaccinated against 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! What if The New Variants go wild before we all are vaccinated? Then what do we do with our lives? What if The B117 takes over due to not enough Americans vaccinated? What do we do then? How do we get our lives back if this was the case? Then what happens next if we don’t reach 80% herd immunity?