James P Allison and Tasuku Honjo win Nobel prize for medicine

American and Japanese immunologists win 2018 award for their work on cancer therapy

• Nobel prize for medicine awarded - as it happened

Two scientists who discovered how to harness the body's immune system to fight cancer have won the 2018 Nobel prize in physiology or medicine.

James Allison, of the US, and Tasuku Honjo, of Japan, will share the 9m Swedish kronor (775,000) prize, announced by the Nobel assembly at the Karolinska Institute in Stockholm.