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“Barbara Loe Fisher failed to note that many scientists before Wakefield had published papers proving the rare tragic consequences of vaccines without risking their career—for example, William Sawyer, who showed that a yellow fever vaccine had been contaminated with hepatitis B virus; Neil Nathanson, who showed that a polio vaccine wasn’t properly inactivated, causing children to become paralyzed and die; and Trudy Murphy, who showed that an early rotavirus vaccine caused intestinal blockage, killing one child. Scientists and public health officials didn’t marginalize Wakefield because he had challenged the belief that vaccines are absolutely safe; they did it because he was wrong—clearly and inescapably wrong.”