The U.S. and Canada both started issuing travel warnings for cruise vacationers. The U.S. started issuing travel warning at the end of December 2018 and Canada began issuing travel advisories two weeks ago.
The U.S. State Department also recently began posting warnings on Twitter regarding certain dangers about cruise ships and ports of call. Its

There are mixed messages about cruising to Turkey, following a spate of terrorist attacks in the last six months and the failed military coup two weeks ago.