ERROR 1
ERROR 1
ERROR 2
ERROR 2
ERROR 2
ERROR 2
ERROR 2
Password and Confirm password must match.
If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)
ERROR 2
ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.
Every spring, microscopic grains of tree, weed, and grass pollen are released en masse, bringing with them an onslaught of seasonal allergies. It’s a busy time of year for both allergists and certified pollen counters, who provide almost daily reports on allergen levels for sniffling locals. Counting pollen requires a patient and discerning eye, but experts David Kerxton and Susan Kosisky have perfected their technique over the past two decades. They walked C&EN through the counting process and answered the question, How bad is this allergy season, really?
Music: “Bright idea” by Geographer, “English Country Garden” by Aaron Kenny, and “Bug catching” by Emily A. Sprague.
Join the conversation
Contact the reporter
Submit a Letter to the Editor for publication
Engage with us on X