The midterms are the first elections in which artificial intelligence is integrated into every major social media platform. Efforts to blunt its harms are uneven.
One in five voters plans to use A.I. to look into a race on their ballot, according a survey released this month by the American Association of Political Consultants.
Brazil spent years targeting electoral lies on the internet. Now, artificial intelligence is stumping the election authorities and reshaping a high-stakes race.
Ending routine vaccination for hepatitis B at birth, as the health secretary has recommended, would increase the number of chronic infections by as much as 83 percent, a team of researchers reported.
Last December, a panel of advisers chosen by Health Secretary Robert F. Kennedy Jr. recommended that parents should decide whether or when infants should get the shot if they were born to mothers who test negative for hepatitis B.
American officials say they have identified similar influence campaigns by Russia and others in years past, all trying to create discord over contentious topics.
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