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Airborne allergens

Airborne allergens are particles in the air, such as pollen and fungal spores, that can cause or worsen allergic reactions and respiratory conditions including hay fever and asthma.

Learning about airborne allergens

Find out about common airborne allergens like pollen, mould, dust mites, and pet dander, and how they affect health. Found indoors and out, these allergens vary with factors like humidity and the seasons.

Health risks

In those who are sensitised to them (sensitive individuals), exposure to airborne allergens causes illnesses like asthma, hay fever and other allergies.

Monitoring and modelling of airborne allergens

Monitoring and understanding airborne allergens are crucial for public health, as they play an important role in respiratory allergic diseases.

Regulatory guidance on airborne allergens

The UK government has set regulations to manage the health risks from airborne allergens like mould and pollen, as well as bioaerosols. These include building codes, green space planning, and waste controls.

Updates to this page

Published 7 August 2025