Urban Lendahl, Secretary of the Nobel Committee for Physiology or Medicine, addresses a press conference
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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.