Can a Simple Allergy Spray Help Prevent COVID-19?

Could a common nasal spray you find in your medicine cabinet help protect against COVID-19? A 2025 randomized clinical trial published in JAMA Internal Medicine tested the allergy spray azelastine—typically used for seasonal allergies—to see if it could reduce the risk of coronavirus infections. In

Can a Simple Allergy Spray Help Prevent COVID-19?
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