Part of the U.S. National Institutes of Health, the Centre identifies and evaluates unconventional care practices, supports and conducts research and research training on these practices and disseminates information. Their web site offers an overview of the six broad categories of alternative medicine: diet-nutrition-lifestyle changes, mind-body interventions, bioelectromagnetic applications, alternative systerms of medical practice, manual healing, pharmacological and biological treatments and herbal medicine.

Find out about the bubonic plague that wiped out millions of people during the Middle Ages.

Find out how the plague spread to different countries, the number of people who died and the symptoms.