Buy betadine gargle every three hours and dilute for nasal rinse as prophylaxis for five months or use it to reduce COVID-19 viral load when infected.
@Purple can you vouch for povidone iodine efficacy on COVID-19?
https://salud.edomex.gob.mx/cevece/documentos/covid/In Vitro Efficacy of a Povidone-Iodine Nasal Antiseptic.pdf
https://www.jwatch.org/fw117046/2020/09/17/covid-19-intranasal-povidone-iodine-drop-flu-vaccine
https://www.medrxiv.org/content/10.1101/2020.09.07.20180448v1
https://jamanetwork.com/journals/jamaotolaryngology/fullarticle/2770785
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7341475/
https://www.peertechz.com/articles/ACMPH-6-193.php