Merck & Co is donating an experimental anti-malarial medicine to a not-for-profit research organization in the latest example of drugmakers stepping up efforts to address health issues in poor countries…Merck said…it had granted the Medicines for Malaria Venture (MMV) an exclusive, royalty-free license to develop a compound discovered by its scientists. Merck will have the option to partner the drug after completion of mid-stage tests…By donating the new drug to MMV, the U.S. company hopes its clinical development will be accelerated.