Understood, thus my wording - as effective as penicillin was at treating the bacterial infections it eradicated.  Only a matter of time until we know more about potentially how close Kevetrin is to completely eradicating the cancers it's being used against.  The mechanism of action is just so perfect - it just might eradicate them all.  Your statement brings up another point to me - just because Kevetrin might eradicate cancer today, doesn't mean that cancer types would not evolve to exploit gaps in kevetrin's effectiveness.  Just as bacterial infections are becoming resistant to penicillin.  Can't worry about that now - the multiple billions in revenue will fuel the development required to keep Kevetrin's evolution one step ahead.