With regard to the Havana syndrome, where Canadian diplomatic employees in Cuba suffered various health symptoms in 2017 and 2018: (a) has the government determined the cause of the health issues, and, if so, what are they; (b) what specific efforts were made by the government to determine the cause of the health issues; and (c) what specific new measures, if any, has the government taken to ensure the health and safety of diplomatic employees and other individuals at the Embassy of Canada in Cuba?