My Father used to gargle with ONE grain of Condy's Crystals, every morning of his life. (DON'T swallow, it's poisoness!)
At night, he'd always have a 'wee dram' of Scotch Whiskey.
I don't ever remember my Father being ill from anything!
As a child I suffered with sore throats regularly.Firstly due to very severe chronic tosillitis which stopped when the tonsils had been removed,and then in later childhood years due to very bad sinus infections which caused post-nasal drip and thus sore throats all the time. I have not suffered a sore throat now for quite some time.I also do not seem to get colds at all any more.It could be due to living in a warm climate.