HAL Allergy Group

The research facilities and headquarters are located at the Leiden Bio Science Park, Netherlands.

[1] The focus since 1959 stems from the development, production and distribution of allergen immunotherapies for the treatment and prevention of allergic diseases.

This is done by its subsidiary HALIX B.V. HAL Allergy originally stems from 'Haarlems Allergenen Laboratorium', a Dutch company set up in Haarlem.

The company started as a small laboratory where, on request of several local general practitioners (GPs), extracts were prepared on a named patient basis to treat against allergic reactions.

The founder of HAL Allergy Johan Kuijper identified at an early stage the relevance of standardisation and stability of allergen extracts as well as being one of the initiators of the establishment of a European Clearing House [2] for allergen extracts from which the Paul Ehrlich Seminars originated.