Air purifiers can be effective at reducing allergens, but they have limitations in completely eliminating all allergens. Common allergens such as pollen, dust mites, pet dander, mold spores, and cockroach allergens can be reduced by using air purifiers with HEPA filters, but smaller particles or certain allergens might still remain. Some air purifiers are also not very effective at ca... https://airhubco.com/are-there-any-potential-allergens-that-air-purifiers-cannot-capture-effectively/