If the vaccine is so effective, why do some people who are vaccinated insist on others being vaccinated. If the vaccine is effective it really should not matter if another person has it or not, you would still be safe.
I believe that the answer is... the longer the virus is "out there", the greater the opportunity is for it to mutate and, hopefully not, it then mutates to one that the existing vaccines are unable to combat it. That would totally suck.
The sooner all of us get vaccinated, the better off we will all be in putting this behind us.