I just signed up with CVS and they did say they had the senior dose. But that may have been location based. We don't have Walgreens so I've not tried them. I did my COVID booster at RiteAid and it was better than my local CVS but the CVS in the city where my therapist practices is better than either of them. It has a Minute Clinic and the shots I've gotten there really did take a minute.