Havana syndrome,” according to a letter sent to Foreign Affairs Minister Marc Garneau late last week.Global News obtained a copy of a letter sent to Garneau on behalf of a group of nine Canadian diplomats and their families who say they are struggling to get answers on the symptoms they say they have experienced since serving at the Canadian embassy in Havana, Cuba.The letter, dated April 21, 2021, references a briefing given to around 40 affected individuals and cites discussions about an apparent decision by Global Affairs Canada to increase staffing at the embassy in Havana and increase the length of postings.“It was explained that a key rationale for this change was that no further brain injuries had been reported since 2018.