Hay fever is a seasonal woe for millions of people around the globe, but there is evidence that warmer climates are intensifying the threat to human health. According to new figures, higher pollen concentrations have led to a 32 percent increase in the number of people showing potentially severe allergies.
Hay fever is an allergic reaction that involves inflammation of the nasal passages, throat and eye membranes. While it usually strikes in spring, it can be a year-round nuisance for some. Different types of pollen can trigger symptoms in different people, meaning everyone’s hay fever season can differ depending on when their allergy-triggering plant is in bloom, according to Harvard Health.
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