Got my first ever herpes labialis / canker sore

I am almost 48 never had them before but on the side I think I am getting another one I am also experimenting with tacrolimus

Question, are you concerned about getting shingles from a weaker immune system? I understand you can’t take the shingles vaccine.

When I was on Tacrolimus years ago I regularly would get herpes outbreaks. They stopped as soon as I stopped taking Tacrolimus.