Canada will re-examine its diplomatic presence in Cuba for further confirmed illness among embassy staff.
An elderly government official said it was too early to say what steps could be taken as a result of the review, but all the options are on the table.
Officials have informed the media on condition that they are not identified.
A total of 13 diplomats sent to the Canadian Embassy in Havana, as well as some dependent persons, have come up with a mysterious illness that causes dizziness, headaches, and difficulty concentrating.
Global affairs say the government continues to investigate the cause and adds that the health and safety of diplomatic staff and their families is a top priority.
The department says that the person who first worsened gets the necessary medical attention.