Oppenheimer even has tips for vacationers. And he advises people with allergies to ask for motel and hotel rooms that have not been used by smokers, or by people with pets. Indoors, people with allergies can minimize their suffering by vacuuming carpets frequently or replacing carpeting with wood, tile, vinyl flooring, or linoleum if dust mites are the main cause of allergies. Use washable curtains rather than heavy drapes or dust-collecting venetian blinds. Make sure your fireplace flue works well too.
Smoke can aggravate allergies.
Clutter, especially un-dusted books, can wreak havoc on the immune system. So , minimize your 'stuff', or commit to a twice-weekly dusting regime. Banish your pet from the bedroom, where one third of each day is spent. Keep the door closed as well. Pet dander can linger for six months or more.