I do research on this bug and I thought I could explain that the 75% mortality rate was referring to the specific syndrome of necrotizing pneumonia. Most Community acquired MRSA cases are skin and soft tissue infection like boils, pimples and abscesses. But sometimes the bug gets to the lungs and causes a bloody pneumonia that seriously destroys lung tissue, called necrotizing pneumonia. I know doctors who have seen kids die of this in a matter of 24-48 hrs after coming to the Emergency room for treatment. THis syndrome causes 75% mortality. The skin and soft tissue infections are often treatable, if the doctors realize what they are dealing with. Hope thsi helps.