We just got off the Quantum of the Seas and had a excellent fun cruise to Alaska with a few exceptions
First about mid way through people started complaining they had food poisoning but it turned out it was Noro virus which was confirmed by some guests who were so sick they saw a doctor while in port in Canada
Also mid way and more towards the end we started hearing of positive Covid
For us on our last day(Canada port) I woke up with a headache and slight c