I did 25 days on Princess in April, May we were not tested at all during the cruise and
all the positives were found when they had to test to go back to the US. We were
only a cruise of 1500 people by the second leg and I gather close to 20% tested positive at the end. Keeping in mind anyone staying in Europe or like me going back to
Canada did not though I did a week later to go to Bermuda and fortunately tested negative