“We should try to try to hold the line and do the things we know are safe, because we still have so much virus out there,” Dr. Watson said. “Regardless of vaccination status, I would not go into a crowded club right now.”Do I need to show proof of vaccination in order to travel? As a means to reboot the decimated tourism industry, the European Union is considering a proposal to adopt a digital pass that would allow fully vaccinated E.U. residents and their families (or those who can produce a negative test or recovery from the virus) to travel freely within the bloc. In the meantime, the airline industry is testing various vaccine passports, which digitally store vaccination records, test results and other health information.