Americans' trust in the medical profession has plummeted in recent years, and lags well behind public attitudes toward doctors in many other countries, according to a new report. That lack of trust comes from how Americans' perceive doctors' motivations, said Robert Blendon, a professor of health policy and political analysis at the Harvard School of Public Health in Boston and co-author of the new report. While physician leaders elsewhere in the world often take public stands on key health and medical issues, Americans perceive the medical profession as looking out for itself, not advocating for public health, he said.