A medieval child whose mummified body was thought to show the earliest known case of smallpox was really suffering from hepatitis, scientists say. DNA analysis of the 16th century remains, found in the Basilica of Saint Domenico Maggiore in Naples, revealed the child was infected with an ancient strain of the hepatitis B virus (HBV). The team believe their findings could help shed new light on the ancient origins of the disease which, according to the World Health Organisation (WHO), kills 1.5 million people a year. Previous scientific analysis of the 16th century remains - which did not include DNA...