Set aside at least one room in the home where the rabbit never visits, a safe area where the immune system isn't stimulated. Your bedroom should be one of these rooms, because so much time is spent there. Dust and vacuum often, not just furniture but door frames, window ledges, lamps and curtains. Damp mop wooden floors, especially under beds and furniture. Store hay in a garage or location where you infrequently go.
Many people find that their supposed rabbit allergy is actually caused by hay and dust mites.
Invest in air filtration units. Although expensive, these filters are an excellent investment and improve the lives of many allergy sufferers. Central air systems with electrostatic filters are also helpful. Clean or change the filters regularly. Try allergy neutralizers.