Pollen allergies: three-quarters of the country on red alert

Pollen allergies: three-quarters of the country on red alert

February 23, 2025

79 departments in metropolitan France are classified as red. Only the departments of the Brittany region, Normandy, Loire-Atlantique, Maine-et-Loire, Mayenne, Sarthe, Somme, Pas-de-Calais, Nord and Aisne are classified as yellow, with significant allergy risks, according to the latest report from the network.

Pollen of cypress, thuja, juniper

RNSA warns against pollen from "cypresses, thujas, junipers" Who "strongly bother allergy sufferers from the southwest to the southeast of the country with a high risk of allergy." "Hazelnuts and alders (Betulaceae family) are in full bloom throughout the country with a high risk of allergy.", adds the RNSA.

Home — The National Aerobiological Surveillance Network — RNSA

Nearly one in three French adults suffer from hay fever

As such, the risk of allergy to these pollens should increase in the North-West departments "in the coming days." In the South, the "mimosas" are also sources of“possible proximity allergies”.

Nearly one in three French adults, and 20% children aged over 9, suffer from seasonal rhinitis caused by a pollen allergy, better known as " hay fever", according to the National Agency for Food, Agriculture and Rural Development (ANSES).

The RNSA recommends that “rinse hair in the evening”, of "drying laundry inside homes", of“air early in the morning or late in the evening” and of "close car windows while driving" to limit the risk of allergies, accentuated by climate change and air pollution, according to Anses.

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