I know you are talking about brochitis, but this option, occurred to me.
If you have never received a pnuemonia shot, please get one.
Mr Compassionate doctor told me, that it won't stop you from getting pnuemonia, but you won't die from it.
A lovely thought from my old physician.
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"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).