Nasal spray for risk reduction (study)

Saw this posted on Bluesky by Eric Topol. Fingers crossed this may be a viable prophylactic. https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2838335?utm_campaign=articlePDF&utm_medium=articlePDFlink&utm_source=articlePDF&utm_content=jamainternmed.2025.4283