In my story, an existing bacterial infection is altered in a lab to become a deadly plague. I need an existing bacterial infection that has the following characteristics: -Can cause sepsis/septic shock/organ failure -Has an existing, known cure, or one could easily be discovered -At least mildly contagious I was thinking the bacteria known as Streptococcus pneumoniae (or pneumococcus) might work, but I couldn't find anything on a cure, just a vaccine. Anyone know if a cure exists/could be made? Maybe a different bacteria that could work? Thanks.