U.S. measles battle hindered by confusion over health secretary response

Robert F. Kennedy Jr., who has a long history of advocating against vaccines, has backed vaccination as the best way to prevent measles from spreading. But unlike previous health secretaries, his comments are not unequivocal. He has also made misleading claims about nutrition, vitamin A and other treatments, while exaggerating vaccine risks, even as U.S. vaccination rates are falling

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