Tina - Warn him in advance that you will be doing this, but try pleading your case as his "caregiver." Here in MN, they are very conscious of using up every vial they thaw so there is no waste, and working hard to get 6 doses from each vial (which leads to a 20% increase in the number of shots that can be given.) This weekend, our largest medical center ended up with 800 soon to expire doses, and quickly opened a clinic to all over 65 to sign up & get injected on Saturday.
Everyone on a wait list should be alert to these announcements, often made on email or social media.
Sue