Do air cleaners help with hay fever and allergies? ‘Be careful with small unknown brands’

Hay fever drives many patients to despair these days, but air cleaners would offer relief. “Relieve you from itchy eyes and a stuffy nose,” “removes 99.95 % of the pollen,” “also filters dust and viruses,” “detects allergens”: they are just a few claims from producers. But is that true?

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