Earlier quoted context omitted.
It’s fairly common for private businesses like pharmacies/clinics/hospitals to have vaccines in much of the world, no?
And you can walk in there and buy it like, say, a bottle of oke? Not without going through a doctor before hand, the same doctor who administers the shot after you picked it up at the pharmacy.
For many of the vaccines you can just go and buy them and store them yourself without any special permission or prescription. Usually you do not want to do it, simply because it is easier for the immunization clinic to take care of it.