President-elect Donald Trump has said he will give Robert F. Kennedy Jr. a senior role in his incoming administration to advance his “Make America Healthy Again” agenda. Trading in pharmaceutical stocks is shaky this week and the details are few surrounding a possible appointment. What To Know: Trump recently said he would let Kennedy “go wild on health” and could “do pretty much what he wants” in his administration, but the details remain murky. Kennedy has a record of spreading falsehoods about vaccines, including that they cause autism, a theory disproven by scientific studies, according to…