People with allergies to alder (Alnus) pollen should consider hay fever complaints in the coming weeks and possibly adjust their diet.
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Due to the very high temperatures, most of the estimated 27 million alders in the Netherlands will soon be in bloom, about a month earlier than normal. That reports the website Nature.
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In December, the alder, originating from the Caucasus, was already in bloom. The peak is expected around 6 February.
According to counts from the Leiden University Medical Center (LUMC), the concentration of alder pollen increased to over 70 pollen per cubic meter of air in the last week of last year.
Hazel
People with allergies to alder pollen may have had symptoms, especially if they are also sensitive to hazel pollen. They also flourished in recent weeks and also much earlier than average.
It is currently hot for the time of the year. Last Wednesday, the temperature in De Bilt rose to 14.4 degrees, with which the warmest January 24 was measured since the measurements started in 1901.
Cover photo by Gstatic
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