The WHO could fund researchers and pay them very well indeed. If some big discovery is found those who did the work get a big bonus, like a million dollars. In return they give up all IP which the WHO or like organization either licenses it out for production or creates facilities, whichever makes the most economic sense. You skip the IP/profit paradigm and medications are available at lower costs than otherwise could be had, while attracting the best minds and rewarding and encouraging them. Keep the politicians out of it and let the scientists and medical people do their job.