It depends on which country you reside but if you live in the UK you can find all the information on all those and what their priorities are.
The first to get the vaccine will be hospital staff and patients, Care home staff and residents, over 80s and those who are extremely medically vulnerable like those people with COPD.
After that it will be the over 70s, 60s, 50s etc
The British Government are trying to ensure everyone is vaccinated by the autumn 2021.
There are a very small minority who say they will refuse the vaccine. Of course that is their right but I believe those who refuse are being extremely silly.