@kims@mas.to This year I opted to have flu and covid shots a week apart, to see if it was the *combination* that was so debilitating. Result: flu shot was fine, no effect other than slightly sore arm. Covid shot was the hard one, as usual: exactly 12 hours later, chills and fever start, and you feel terrible for the next 12 hours. Very sore arm. So, I don't think it matters if you get both together; if you have a functioning immune system, the covid shot will trigger it big-time. Plan for a day off.