Nobel Prize rewards parasite disease research
5 October 2015 Last updated at 14:09 BST
The Nobel Prize for physiology or medicine has been split two ways for groundbreaking work on parasitic diseases.
William C Campbell and Satoshi Ōmura found a new way of tackling infections caused by roundworm parasites.
Youyou Tu shares the prize for her discovery of a therapy against malaria.
Secretary of the Nobel Academy at Karolinska Institutet Urban Lendahl made the announcement.
Professor Hans Forssberg of the Nobel Assembly outlined the significance of the discovery.