SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Napo Pharmaceuticals, Inc. (“Napo”) is proud to announce that the Company is part of the Call to Action led by PATH, UNICEF, and WHO to raise the visibility of diarrheal disease and solutions to address it. The Call to Action includes the invitation to “invest in the research and development of new effective, appropriate and affordable prevention and treatment options for diarrheal disease.”