My understanding is that you are much more likely to get a negative result on an antigen test and still potentially have Covid than a positive result when you don’t have it. Of course there are false positives, but the PCR is much more sensitive and will pick it up easier. I would think it would be safe to assume a positive lab confirmed antigen test and doctor’s note would be enough for boarding, but that isn’t what’s stated on the site which I find a little confusing. The US entry testing allowed for antigen results when that was required. I don’t understand why NCL would have different rules for this, but I don’t want to take a chance and be denied boarding. I guess I’ll just put those Emed tests to use. I went to the trouble of seeing my doctor for the certificate of recovery and bugging the office for weeks when they kept forgetting to send it to me, so I would like to make use of this, but oh well.