A White House panel is warning the swine flu could soon infect half the US population. In a new report, the President’s Council of Advisors on Science and Technology says although most cases will be mild, up to 90,000 people could die, and up to 1.8 million could require medical attention. An estimated 300,000 people could require hospitalization in intensive care. Officials say the figures don’t mark a prediction but a “plausible scenario.”