The holidays can be anything but joyous for people with allergies when they contend with fresh trees, scented candles and other allergy triggers. “The dust from the boxes and on the decorations that have been packed away in dank basements or dusty attics is triggering reactions in my allergy and asthma patients,” Dr. Rachna Shah, an affiliate faculty member at Loyola University Chicago Stritch School of Medicine, said in Loyola news release.