I had both my covid and flu jabs together and arms felt grim afterwards. 4 weeks ago got pneumonia and was on 2 runs of antibiotics. now got stinking cold, cough, aches and feeling yuck. covid test neg this morning. 5 grandkids means plenty of chance for picking up things. think the best advice is avoid crowded spaces if you can and also space the jabs out as it's a big whack on the system in one go.