Sniffling. Sneezing. Runny eyes. Springtime brings a rush of seasonal allergies that plague us but historically, allergies were mild if they existed at all. In fact, allergies became a force to be reckoned with only in the 1970s. Cheddar explains how we’re to blame for our own allergies.
Further Reading:
1: Atlas Obscura
https://www.atlasobscura.com/articles...
2: Nature
https://www.nature.com/articles/35037000
3: Encyclopedia Brittanica
https://www.britannica.com/science/Du...
4: Tree Clinic
http://www.treeclinic.co.uk/
5: Scientific America
https://blogs.scientificamerican.com/...
6: Science Direct
https://www.sciencedirect.com/topics/...
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