How to make my home livable for someone visiting with allergies?

Indoor allergy: Depends on allergy, but: no smoking in home use hepa type air purifier if pet dander allergy, thoroughly vacuum, clean upholstered surfaces, remove pets completely. If mold allergy, no indoor plants and remove other sources of mold and water/moisture if dust mite allergy, use pillow/mattress encasements, dehumidifier, etc. There is much to be done!