Looking back to the last wave, UK was about where they are now on January 1st, at 45K cases/day and rising. On that day they were averaging 560 deaths/day. Today, they are again at 45K cases/day and rising, but deaths are 40/day. That's about a 93% reduction. Even if it's only a 90% reduction, or even 80%, it should be very manageable.
Here in the US, we are not as homogeneous as the UK. We will see some localized/regional outbreaks that will be sensationalized, but should be fine in most areas.
That's an interesting figure. Not far off the efficacy numbers for the Pfizer and Moderna vaccines.