The Obama administration has vowed to stop using health workers and fake vaccination programs in clandestine operations. The move comes in response to the fallout from the CIA’s fake vaccination campaign in its search for Osama bin Laden. The Taliban subsequently banned immunization efforts and launched a string of deadly attacks on medical workers, helping fuel a polio outbreak inside Pakistan. In a letter to the deans of 12 U.S. public health schools, White House counterterrorism adviser Lisa Monaco said the CIA stopped the practice last August.