Thank you Michael, and I understand your dilemma.
I don't know you personally ( but you are one of my loyal Forum friends). However, the 'flu jab would not " break your immune system down " - it's safe for the vast majority of people. Your own doctor will, of course, know you and be best placed to advise you, indeed offer you a free 'flu jab.
Please look again at this thread, in particular posts 35 and 42 :-
http://filipinaroses.com/showthread....-Flu-jab/page2