William C Campbell, Satoshi ÅŒmura and Tu Youyou win Nobel prize in medicine

Campbell and Amura win for their work on a therapy against roundworm, sharing the prize with Tu for her work on a therapy against malaria

Three scientists from Ireland, Japan and China have won the Nobel prize in medicine for discoveries that helped doctors fight malaria and infections caused by roundworm parasites.

Tu Youyou discovered one of the most effective treatments for malaria while working on a secret military project during China's Cultural Revolution.