In a significant leadership shake-up, Jay Bhattacharya, the director of the National Institutes of Health (NIH), has been appointed as the acting director of the Centers for Disease Control and Prevention (CDC). This decision follows the exit of the former director, O’Neill, with the White House identifying Bhattacharya as a suitable interim head amidst the ongoing search for a permanent replacement. The appointment comes as the Trump administration looks to stabilize the agency, which has faced criticism and calls for reform. This dual role will see Bhattacharya overseeing both the NIH and CDC during this transitional period.