How long can one take immune boosing mushroom formulas?

I'm particularly interested in taking turkey tail in an herbal supplement. I would like to know how long is it safe to take this and whether since it is immune stimulating it can cause imbalance in the immune system over the long run? I am trying to treat hpv and dysplasia. I have read that this supplement is particularly good for treating hpv. Does anyone know? Thanks. Tweet