Bed covers and dust mites.
Peter B
PB
Boggs
D000485:Allergens; D000818:Animals; D001249:Asthma / Q000517:prevention & control*; D001512:Bedding and Linens; D004781:Environmental Exposure / Q000517:prevention & control*; D006801:Humans; D008925:Mites / Q000276:immunology; D012221:Rhinitis, Allergic, Perennial / Q000517:prevention & control*
D000485:Allergens