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
2: Nature
3: Encyclopedia Brittanica
4: Tree Clinic
5: Scientific America
6: Science Direct
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