I can't remember which one it was, perhaps This American Life, but a podcast I heard had a company trying different tactics to get people to vaccinate. The most successful campaign was telling people that an appointment had been reserved for them (more than lottery tickets and prizes, data and info, etc.). The primary turning point for most people was convenience, not convincing. So while door to door shots might creep people out, I do believe that kind of thinking is the right track.