I'm currently recovering from a viral infection, I had fever and ulcers all around my tonsils and throat. I'm doing much much better but I started smoking again as I stopped for a week since I got ill. I'm taking antihistamines and klacid right now and I was wondering if the smoking can make my state worse or just slow down the recovery? because I heard that klacid is really good and hence was wondering if it will prevent more ulcers from appearing?