If you have a COVID-19 vaccine and the next time you have a flu shot you might want to curb your use of any non-steroidal anti-inflammatory drugs (NSAIDS) like Aspirin. It is possible that these anti-inflammatory drugs could hinder your body from making the antibodies that will protect you, the reason you are taking the vaccine.
Common Pain Relievers May Dilute Power of Flu Shots
https://www.clinicaleducation.org/news/pain-killers-adersely-inhibit-vaccination-benefits/
