The current requirements listed on the Tauck website do not include a negative covid test (in addition to being vaccinated) to enter Portugal but reading other websites I think this is incorrect. I followed Taucks link to the locator form that is required and delving deeper on the same website to the FAQs found this,
"Mandatory negative test is required, even for vaccinated people (or digital recovery certificate), for those who arrive in Portugal by:
Plane. Sanctions for airlines (20 thousand euros per untested person arriving in Portugal);"
When I looked at the U.S. Embassy website it said the same.
My cruise isn't until this fall but if your's is sooner you might want to check into this.
