At the gate, they just checked my passport and boarding pass again. In Lisbon, they checked my vaccine documentation and passport and that was it. This was simply my expertise though, and I still advocate getting the test simply in case they do ask. Many countries also use testing to incentivize vaccination by waiving the requirement for vaccinated folks, stated Meghan Benton, a research director at the Travel News Migration Policy Institute, which tracks travel requirements. The United States encourages vaccination in its personal method by prohibiting most unvaccinated visitors from overseas from entering. A statement from the State Department …