@salyavin Had booked up for a flu shot and was planning to make a separate COVID shot appointment, but found on the day they had spare COVID shots from cancelled appointments.
Hadn't thought to ask, but it turned out to be Pfizer.
Side effects: delayed muscle pain in area of shot & higher body temperature for a couple of days, but degree of pain & fever seems to differ between individuals.
https://news.yahoo.co.jp/expert/articles/12d25237c01916e9fef2f0b85b0180ffc91330ba