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Azelastine Nasal Spray Cuts COVID, Cold Risks by Threefold

10/8/2025

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Summary

Story summary

In a study, azelastine nasal spray reduced infection risk for COVID-19 and the common cold threefold versus placebo.
Experts say larger studies are needed to confirm the findings and determine effective dosages.
Nasal sprays are being explored for blocking respiratory viruses at their entry point.
Harvard researchers developed a gel that blocks viruses in lab models but requires frequent application.

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Story summary

In a study, azelastine nasal spray reduced infection risk for COVID-19 and the common cold threefold versus placebo.
Experts say larger studies are needed to confirm the findings and determine effective dosages.
Nasal sprays are being explored for blocking respiratory viruses at their entry point.
Harvard researchers developed a gel that blocks viruses in lab models but requires frequent application.