Three scientists who discovered the virus Hepatitis C have won the 2020 Nobel Prize in Medicine or Physiology.
The winners are British scientist Michael Houghton and US researchers Harvey Alter and Charles Rice.
The Nobel Prize committee said their discoveries ultimately “saved millions of lives”.
The virus is a common cause of liver cancer and a major reason why people need a liver transplant.
In the 1960s, there was huge concern that people receiving donated blood were getting chronic hepatitis (liver inflammation) from an unknown, mysterious disease.
The Nobel Prize committee said a blood transfusion at the time was like “Russian roulette”.
Highly sensitive blood tests mean such cases have now been eliminated in many parts of the world, and effective anti-viral drugs have also been developed.
“For the first time in history, the disease can now be cured, raising hopes of eradicating Hepatitis C virus from the world,” the prize committee said.
However, the virus still infects 70 million people at year and kills around 400,000.