Gargling, using saline solution or tablets is a waste of time, because they deal with Covid in the body and not the virus in the head, where it is at its most vulnerable - how silly such an easy thing to destroy, is left to become the
bio-weapon which kills you.
I have been doing this for over 27 years and not one person has died from this simple cure, or been injured from it from those I have been able to pass it on too, myself included.
The Iodine in the salt kills Coronavirus or the Flu, in the nasal passages of the head and flushes out the escutcheon tubes to the ears, the brain stem and the brain bulb, so no long Covid either - dead Coronavirus = no Covid in the body ever and the salt water provides a protection over the surfaces where Coronavirus and the Flu like to breed - pour a bit of solution on a flat surface and see how it dries - what viruses hate, because it murders them, kills them dead.
Irrespective of if you have been vaccinated or not, do my simple, free cure and avoid further booster shots if you can - or better yet, don't get vaccinated at all - the vaccines kill, one way or another and horribly too, sooner or later and then we get around to those Nanobots and other things in the vaccines (shudder).