The vaccine distribution in Colorado seemed to become more organized in Colorado in February with both the Pfizer and Moderna available.
They started out with high risk health care worker and long term care facility staff and residents. Next came 70+, more health care workers, fire fighters, EMS, etc. Then ages 65-69, teachers and other school personnel.
I don't think the very rural areas were as successful with the vaccine rollout during these groups though until the Johnson & Johnson vaccine was approved at the end of February because of the storage requirements for the Pfizer and Moderna.
Once the J&J was approved the phases changed. My group (60-64) was originally set to be included in Phase 2 sometime in the spring but once the J&J was approved the phases were changed and they bumped my age group up, putting many occupations down into the next phase.
Colorado started Phase 1.B.3 on March 5th. This phase includes those 60-64, frontline essential workers in grocery and agriculture, and those with 2 high risk medical conditions. I was sent an email on Tuesday (March 9th) to sign up for the vaccine. Slots were available for Wednesday and Friday. I do a Zoom class on Thursdays, so chose Friday in case my arm was sore or I had a bad reaction.
I got the Moderna. Sore arm (still) and some fatigue yesterday but not other reaction. I have my 2nd appt set in 4 weeks. We get a COVID-19 Vaccination Record Card with the CDC logo on it after the first shot (which we need to bring back for the 2nd shot). I guess that will be our proof for travel.
There were vaccinators just sitting there with no one to give shots when I was there, so I it seems they could have fit more people in. Not sure if people canceled appointments or people just did not want to sign up.
The next phase (1.B.4) will start by March 21st and will include those 50-59, those with 1 high risk medical condition, as well as many occupations.
The last phase is the general public - those not qualifying in any of the earlier phases.
There are many options for vaccine administration now, including pharmacies, health centers, community centers, and in big cities they have vaccine drives.
I was on the list at my health care center. Our names were randomly picked. Our town had a J&J clinic the weekend before with many available slots (before I got my email) but I really wanted to get either the Pfizer of Moderna. I took a chance and waited, figuring that after a year of basically staying at home, a week or two more wouldn't be that big of a deal. Someone who works at the hospital (where I got my shot) told me you could tell which vaccine you would be offered in the sign up email by the choice - make 2nd appt in 3 weeks (Pfizer), make 2nd appt in 4 weeks (Moderna), or no 2nd appt (J&J). My email had appts with the 2nd in 4 weeks so I knew that meant Moderna.
My aunt also lives in the same town that I do. She is 70 and has already received both of her vaccines (end of Jan/2nd shot in Feb). She got Pfizer. She was originally called in January to get a vaccine in Fort Collins, a 3 1/2 - 4 hours drive away depending on snow conditions! She waited and finally the vaccines came to our town. So at first, the vaccines were available only in big cities, but now things are moving much more quickly.