Video Ad Feedback Dr. Sanjay Gupta on the impact of Covid-19 five years later 2:12 - Source: CNN Dr. Sanjay Gupta on the impact of Covid-19 five years later 2:12

Amid the uncertainty surrounding eligibility for and access to the latest Covid-19 vaccine, a new study has found that a common nasal spray could help prevent infection.

This randomized placebo-controlled trial examined the effectiveness of the nasal spray azelastine in preventing Covid-19 infection, as published in the journal JAMA Internal Medicine on September 2. Researchers concluded that the chance of developing Covid-19 was about three times lower in the azelastine group compared with the placebo group.

What is azelastine, and do these study results mean we should start stocking up on this nasal spray? A

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