There's a big market for new treatments for TB, malaria and other ailments. But most of these diseases afflict low-income people unable to pay for medicine.
Each year 50 000 people from 89 countries, in every continent except Antarctica, die from leishmaniasis, an ancient neglected disease.
A team of medievalists and scientists look back to history – including a 1,000-year-old eyesalve recipe – for clues to new antibiotics.
Emerging diseases on which the experts are keeping a close eye.