most likely

that
1-all(most) 60+ will get the vaccine and,
2-death rate will drop to zero in 3 months
3-then the lockdowns will end and everything will be back, restaurants bars shops.. even jobs
(because deaths are the reason for the lockdowns not positive test results)
4-and virus will saturate everywhere
5-so everyone below 60 will face virus no matter what they do before they get any vaccine at all.. probably at least 6 months to 9 months

did you ever think about that?