MRSA stands for methicillin resistant Staphylococcus aureus, and is responsible for about 20,000 annual deaths and over 300,000 hospitalizations, and over $4 billion spent annually on fighting it. It is extremely resistant to a host of antibiotics and its resistance is increasing. Hospitals are literally running out of antibiotic options to treat this deadly infection. It's an epidemic in hospital and nursing home environments. A highly effective new antibiotic that is priced right will be an instant blockbuster drug.