believe123: Thanks for the info? Where did y'all go for the test? Your husband is correct that a PCR is a type of NAAT. And the at-home tests made available by the USPS are antigen tests, not molecular-whatever tests like the PCR. Like you, this is just one more thing I don't need the hassle of dealing with. I'm kind of the "organizer and planner" for this cruise which includes my wife, myself, and my sister and her husband who live far away and have never sailed on MSC. I suspect that the PCR test may be a requirement for entry of some of the counties being visited and NOT MSC's requirement. Then again, who knows?