With AIDS drug prices slashed for the poorest countries, the problem now is how to get the vital medicine delivered to people with the disease, the head of Swiss pharmaceutical giant Roche said Friday. "We need infrastructure, training ... political will and commitment," Roche chief executive Franz Humer told Dow Jones Newswires...Large drug companies are not the only members of the private sector expected to play their part, he said. "Major employers in afflicted countries should also allocate resources to promote prevention," Humer said.