In brief

The birch pollen season has started. The critical symptom threshold (80 grains/m³) has been exceeded since last Wednesday. It is recommended that people sensitive to this pollen type take all necessary precautions to limit allergic symptoms, especially during dry periods.

While the flowering of alders and hazels is almost over, many other trees are emitting pollen into the air: ash, hornbeam, willow, poplar, elm and cupressaceae.