I was just diagnosed with diabetes. (losing weight tho). i am vaccinated with pfizer but thinking of getting moderna for my booster. will i have stronger protection if i mix? also, i worry mixing will make me have stronger effects like fever does it?

There are not (yet) formal recommendations on mixing COVID-19 vaccine types, but many infectious diseases specialists believe it is a good idea. The Pfizer and Moderna vaccines are similar, but they probably active different clones of T lymphocytes, the cellular immunity aspect of vaccines and prevent. In theory, this enhances protection. As far as known, no increased risk of side effects.