Hesperian's classic manual Where There Is No Doctor 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 75 languages, the manual provides practical, easily understood information on how to diagnose, treat, and prevent common injuries and illnesses. Special attention is focused on nutrition, infection and disease prevention, and diagnostic techniques as primary ways to prevent and treat health problems. The 2017 updated edition includes the latest pharmaceutical information, new information on mosquito-transmitted diseases, vision and eye problems, contraception, and more.