Companies that develop drugs to treat diseases of poor countries such as malaria should be rewarded with vouchers that might speed up government review of far more lucrative drugs, researchers proposed on Tuesday (March 7). Another set of researchers suggested that rich countries subsidize the use of the most effective drugs to fight malaria in poorer nations. Both reports, published in the journal Health Affairs, are aimed at finding ways to eradicate easy-to-treat diseases that persist because there is little profit in fighting them.