A man presents his "green passport," proof that he is vaccinated against the coronavirus, on opening night at the Khan Theater for a performance where all guests were required to show proof of vaccination or full recovery from the virus, in Jerusalem, Tuesday, Feb. 23, 2021. (AP Photo/Maya Alleruzzo)
Passengers wait to scan their IDs at the TSA checkpoint at Memphis International Airport Dec. 2, 2020. (Patrick Lantrip/Daily Memphian)
Vaccine passports: A new term to learn?
The United States and some European countries are exploring the concept of “vaccine passports,” which would allow passengers to travel more easily if they have been vaccinated against COVID-19. However, those types of passports face a variety of logistical and ethical issues.