Two decades after they were spurred into action to tackle AIDS in Africa, global drugmakers said on Wednesday that they would invest $50 million over three years to fight cancer and other non-communicable diseases in poor countries.

Twenty-two companies, including Pfizer, Merck, Novartis, Roche, Sanofi and GlaxoSmithKline, will contribute funds and expertise to the project, which is backed by the World Bank.

The so-called Access Accelerated initiative was announced at the World Economic Forum in Davos, Switzerland, and aims to improve both treatment and prevention.