%$?# Allergies!

The video explores the causes and effects of allergies, focusing on pollen and the immune system's response. It discusses the role of histamine in allergy symptoms and the increasing prevalence of allergies in developed countries. The video also highlights research on potential solutions, including desensitization and the role of the microbiome. An interlude briefly covers astronomy and the Hubble telescope.

What new insight or understanding did you gain from this video?