Hypertonic salt gargles (around 3% concentration) and rinses can be beneficial when feeling sick.

“what's great about salt is you can you can actually rinse out both of those orifices right you can do sterile water salt nasal irrigations and you can also gargle in your throat with um saline solution the the higher the salt concentration the greater antibacterial antiviral effects it'll have so essentially you can do an isotonic point nine percent but you're gonna have a great a much greater killing at three percent a hypertonic type of solution”

“gargling salts doing nasal salt rinses with sterile water has been shown to cut on the duration of upper respiratory tract infections by two days reduce viral spread among household contacts reduce viral shedding”