I read the label on the back of Betadine® Antiseptic Sore Throat Gargle (povidone-iodine, 0.5%) and it says “do not use this product for more than 7 days unless directed by dentist or doctor”. Hmmmmm ????
more alternatives to reduce risk...
https://www.frontiersin.org/articles/10.3389/fdmed.2021.648547/full