Vaccines work?  

Hi nice of you to add to this.

There are many countries that not one person has gotten a vaccine, supplies are reasons for some and a few countries don't want the vaccine.

The question comes down to what is the meaning of "works".

Everyone I know feels the vaccine helps once you get Covid, but does not stop you from getting it or passing it on to others.  So, I think the meaning of "works" is left up to you.

It is obvious not, "save the planet,". kind of thing!