Keeping the nose and mouth clean can prevent viral infections. Article: Effect of 1% Povidone Iodine Mouthwash/Gargle, Nasal and Eye Drop in COVID-19 patientArticle: Oral and Nasal Virucidal Therapy in Prevention and Treatment of COVID-19 Video: Redding doctor says there is an extra layer of protection against COVID-19 available Podcast: Keeping Clean Where it Counts