Hapten Sciences: Memphis company, Ole Miss patent poison ivy 'vaccine'

The summertime mantra of "leaves of three, let it be" may hold less importance if a Memphis company and a regional university's patented product is effective. Poison ivy is nearly everywhere in the South - from forested areas to backyards - but often goes unseen until a skin rash appears and itching commences. Memphis-based biopharmaceutical firm Hapten Sciences and the University of Mississippi have multiple patents on a compound they hope will clear up exposure to poison ivy's potent...