We sailed last month on another cruise line and everyone had to have a covid test done at port - talk about stressful! At least with RC, you can take your Covid test prior to embarking and arrive with a negative covid test in hand, but I still have a crazy fear of being denied boarding!  Perhaps the fear has been embedded in me from the previous cruises we have taken since the pandemic  - we would see many, many families turned away at port for positive tests.  Back to RC, is it only those with