Not sure if this is the correct thread for this message?
If you are age-65 or older and immuno-compromised then the CVS Pharmacy all across New Hampshire have available appointment time slots for a third vaccination shot, plus you can get a flu shot as well, in the same visit.
I don't know but it's my guess they do the covid shot into one arm, and do the flu shot into the other arm?
If interested go to
www.cvs.com/coronavirus to schedule an appointment.