As I see that several people of this thread are active posters, passing along that my parents were told that some cruise companies (maybe all?) have an agreement with the state of Alaska that they will not disembark COVID positive passengers which is why my parents have to stay onboard until the cruise ends in Vancouver. It is probably for the best since they have easy access to food and medical professionals. However, Canada has a mandatory 10 day quarantine instead of the five days in the US.