methicillin-resistant staphylococcus aureus infection
"I am a CF patient that has MRSA in my lungs. Any time I have a flareup, I'm always given oral Zyvox and it knocks the infection out quickly and keeps it away for months! 

Great drug, minimal side effects, very rare for resistance to develop, etc. Only downside is the price, but luckily my insurance covers it with just a 1 dollar or so copay."