The Nobel Prize in Physiology or Medicine 2015 was divided, one half jointly to William C. Campbell, Ireland, and Satoshi Omura, Japan "for their discoveries concerning a novel therapy against infections caused by roundworm parasites" and the other half to Youyou Tu, China "for her discoveries concerning a novel therapy against Malaria".

Diseases caused by parasites have plagued humankind for millennia and constitute a major global health problem. In particular, parasitic diseases affect the world's poorest populations and represent a huge barrier to improving human health and wellbeing. This year's Nobel Laureates have developed therapies that have revolutionized the treatment of some of the most devastating parasitic diseases.

William Campbell and Satoshi Omura discovered a new drug, Avermectin, the derivatives of which have radically lowered the incidence of River Blindness and Lumphatic Filalriasis, as well as showing efficacy against an expanding number of other parasitic diseases. Youyou Tu discovered Artemisinin, a drug that has significantly reduced the mortality rates for patients suffering from malaria.

These two discoveries have provided humankind with powerful new means to combat these debilitating diseases that affect hundreds of millions of people annually. The consequences in terms of improved human health and reduced suffering are immeasurable.