How can you catch streptococcus, a germ that causes strep throat, and if you do catch it, what is the best way to get rid of it?

OK so I'll give you two examples you can catch it if someone who is infected coughs or sneezes so basically it can be spread via airborne or you can even get it from sharing food or drinks also the best way to get rid of strep will be antibiotics/over the counter medicines or gargling warm salt water