I know that a vaccine or a negative covid test, plus the health form, are required to travel by plane or air to and from the mainland and islands.
I also know that the health form is not needed for inter-island ferry travel.
My question: Is the vaccine or a negative covid test required for inter-island ferry travel? An email from Ferryhopper, from which I purchased tickets, says it is. But I can't find any information on the official websites on the issue.
Thanks