The November 19, 2018, issue of The New Yorker has a lengthy article about the medical problems experienced by some U.S. diplomats in Cuba starting in late 2016 (and after the U.S. presidential election). 
The conclusion, however, is the same as previously reported: some U.S. personnel did suffer injury and the U.S. Government has publicly stated it does not know the cause or perpetrator of these injuries.
But the article does provide greater details about many of the victims having been CIA agents and about the U.S.-Cuba interactions over these incidents.
 Entous & Anderson, Havana Syndrome, New Yorker at 34 (Nov. 19, 2018).
 See posts listed in the “U.S. Diplomats Medical Problems in Cuba, 2017-18” section of List of Posts to dwkcommentaries—Topical: CUBA.