What Al said. I would add: Coconut oil mixed with honey. Let it melt slowly in you mouth and go down your throat as slowly as possible. Do not drink for 15 mins afterwards. Done several times a day this will relieve throat pain to almost none.
What Hit_it_Raw said, I would add

- Coincidence, I was just making some to try it. I happened to have coconut cream I made recently. I mixed raw coconut cream, raw honey, raw butter and raw cream. Awesome. Eggs would be good also.
Basically all these things coat the throat. Strep throat is basically compromised mucous membrane tissue in your throat area which could be caused by a number of things, such as shouting, talking too much, cooked food, sugar, coffee, tea, alcohol, soft drinks, rotten vege oils, excessively dry air, chemicals in the air, rough, dry, salty, sour or too hot food. All that is important is to coat the area, so that the tissue can repair itself.
Avoid talking, singing, screaming, and make sure you breath through your nose.
Catching it from another person simply means that your immune system was compromised for whatever reason and the last straw landed on the camel's back.