U.S. public health agencies are collaborating on extensive studies that will examine all the possible causes of autism, including vaccines, U.S. Health Secretary Robert F. Kennedy Jr., President Donald Trump and several public health officials announced today during a White House event. U.S. public health agencies are collaborating on extensive studies that will examine all the possible causes of autism, including vaccines, U.S. Health Secretary Robert F. Kennedy Jr., President Donald Trump and several public health officials announced today during a White House event.