Povidone iodine has been used in Bangladesh for Covid according to this
The Inexplicable Suppression of Hydroxychloroquine, Ivermectin, and Other COVID-19 Treatments | PART 1
https://www.theepochtimes.com/dr-pet...xeAHzyuQ%3D%3D
I've been using dilute Lugol's solution for bacterial sinus infections. Its highly effective. See the bottom of this page
http://sciliterature.50webs.com/AntisepticLozenges.htm