We've done so well with getting the first set of vaccines underway but given the government's track record on just about everything else Covid-related I can't help but to feel pessimistic about the rollout of second vaccines. It's all twice as complicated now, with not only a limited time slot to recall patients (within 12 weeks), but also the need to have the "correct" second vaccine for each person (AZ vs Pfizer) available on the day of the appointment. Any health professionals able to reassure me that planning for this is in hand? Will clinics have a stock of both? For first doses it feels like you get given whatever happened to be delivered that morning.
I've been reasonably relaxed about the delay between doses but I don't think I feel particularly comfortable at the prospect of having two completely different technologies injected into my arm, never tested in conjunction with each other, either for efficacy or inter-reactions.