From the article:
Group A gargled with 10 milliliters of 1% povidone-iodine for 30 seconds, three times per day.
OK, so no dilution. I saw that but wasn’t sure what it meant. I think I’ll pass. LOL
5 will get you 10 that you could do the same thing with a hydrogen peroxide gargle as well. I use it already as my go to mouth wash. It’s on the bottles instructions the ratio... I forget if it’s 10-1 or what...