Introduction: Within six months of its emergence, SARS‑CoV‑2 has infected 5.5 million people worldwide, causing >345,000 deaths. The virus is transmitted through respiratory droplets and physical contact from contaminated surfaces to the mucosa. Hand hygiene and oral decontamination among other measures are key to preventing the spread of the virus. We report the in-vitro virucidal activity of topical and oral povidone-iodine (PVP‑I) products against SARS‑CoV‑2.
Methods: Suspension assays were used to assess the virucidal activity of PVP‑I against SARS‑CoV‑2. Products were tested at a contact time of 30 seconds for virucidal activity. Viral titres were calculated using the Spearman-Kärber method and reported as TCID50/mL.
Results: All four products (antiseptic solution [PVP-I 10%], skin cleanser [PVP-I 7.5%], gargle and mouth wash [PVP-I 1%] and throat spray [PVP-I 0.45%] achieved ≥99.99% virucidal activity against SARS-CoV-2, corresponding to ≥4 log10 reduction of virus titre, within 30 seconds of contact.
Conclusion: This study provides evidence of rapid and effective virucidal activity of PVP-I against SARS-CoV-2. PVP-I-based products are widely available for medical and personal use for hand hygiene and oral decontamination and could be readily integrated into COVID-19 infection control measures in hospital and community settings.