CofixRX has been of the opinion that the right formula with Povidone-Iodine could be a phenomenal, if not revolutionary, approach to aid in the reduction of and prevention of viral transmission between one another as we go about our day-to-day routines. The link below share a doctor's experience and study working with a Povidone-Iodine based nasal spray.
For a professional/clinical paper it's an easy read and well worth diving into if you've been wondering about the efficacy of nasal sprays in reducing transmission of not just COVID-19 but other viruses as well including influenza, hrv, and even the common cold. If the NIH felt it worthy of sharing, we figure we'd help our customers track down the study.
The link below points to an article that seems to support quite well the efficacy of Povidone-Iodine (PVP-I) Oro-Nasal Spray: An Effective Shield for COVID-19 Protection for Health Care Worker (HCW), for all.