please do yourself a favor and watch it...in it you'll find that having 2 vaccine shots protects a fair amount for today's leading variant in the U.S., i.e. "Delta"...BUT, they provide almost ZERO protection against the on-coming Omicron variant...they actually display charts showing the vaccine 'neutralization' effect on each prominent COVID-19 strain/variant, right from the start of the pandemic...including the B.1.1.529 (Omicron).
The Grand Rounds video also makes clear that those who have 2 mRNA shots, PLUS a Booster, are fairly well protected (~75%) against getting infected, and if infected, extremely good protection against hospitalization or worse...seems like a "No-Brainer" choice, doesn't it...Oh, and they also say that those who have already contracted the virus, have NO immunity against Omicron...BUT...BUT...if those people get an mRNA shot, they become "SUPER IMMUNE"...their words, not mine...so again...GET VAXXED!...(FULLY).
I'm literally just trying to help you and others...no other reason.