Just in time for Spring, ScienceGoddess, aka Joanne Manaster, explains the cellular reactions that cause allergies. Her illustrations: candy (looks like Skittles or M&Ms) and a lovely cookie basophil made by food blogger Notsohumblepie. This video ends on something of a cliffhanger, so if you want to watch the next one, it's all about eosinophils.
Allergies explained using cookies and candy
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