
Dr. Markus BergerHead of the Austrian Pollen Information Service © Foto Wilke

Allergy or cold information sheetRecognizing the difference © screencode GmbH

Purple alder© Johannes Bouchal

Purple alder© Johannes Bouchal

Purple alder© Johannes Bouchal

Ragweedmarkus Berger

Ragweedmarkus Berger

Ragweedmarkus Berger

House dust mite© iStock