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?
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ShiftMaking City Living Better
Around the world, cities keep growing, creating gridlock, crowded sidewalks and failing infrastructure. Despite the crowds, loneliness is a problem, too. Learn how smart tech can improve the quality of urban life.