Hesperian"s classic manual, Donde no hay doctor (Where There Is No Doctor in Spanish), is perhaps the most widely used health care manual for health workers, clinicians, and others involved in primary health care delivery and health promotion programs around the world. With millions of copies in print in more than 70 languages, the book is an irreplaceable health resource in communities worldwide. As with all Hesperian books, the manual provides practical, easily understood information on how to diagnose, treat, and prevent common diseases. Special attention is focused on nutrition, infection and disease prevention, as well as the use of diagnostic techniques as primary ways to prevent and treat health problems. The 2012 version of Donde no hay doctor includes updated information on how HIV/AIDS is reflected in many health issues, as well as updated information on children and aspirin, preventing the transmission of blood-borne diseases, stomach ulcers, hepatitis, and malaria treatments.