Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Europe Split on 'Vaccine Passports' Jamie Dettmer European governments are split over whether to introduce vaccine passports with the tourist-dependent southern member states of the bloc touting them as a possible way to reopen international borders and encourage a resumption of travel. Greece's Prime Minister, Kyriakos Mitsotakis, has been at the head of a pack of national leaders urging the European Commission to start preparing a framework for vaccine certificates. Last week he urged the EC to shape "a common understanding on how a vaccination certificate should be structured so as to be accepted in all Member States." Proof of vaccination could help countries open up faster, say Europe's airlines, hoteliers and the continent's hard-struck travel agencies. Last week, Zurab Pololikashvili, secretary general of the United Nations World Tourism Organization, called for countries to adopt digital vaccination passports, which he said would get the world traveling again. "Vaccines must be part of a wider, coordinated approach that includes certificates and passes for safe cross-border travel," he told a global tourism gathering in Madrid. But EU privacy activists are sounding the alarm and epidemiologists warn travelers bearing a document verifying they have been inoculated may still get infected and be able to spread the virus. The issue of vaccination certificates was discussed last Thursday by EU leaders, but there was reluctance to commit to any plans. EU officials say there are a number of critical questions that need answering first, including whether vaccinated people can still spread the virus. There are also worries about variants diminishing the effectiveness of the current vaccines. Also, there are disagreements over what rules should apply to travelers who received vaccines not approved by the European Medicines Agency (EMA). Because of insufficient supplies of the Johnson/Pfizer and Moderna vaccines, which have been approved by the EMA, a frustrated Hungary is purchasing supplies of Russia's Sputnik V vaccine. "For an agreement on the standards, other summits will be needed," a senior EU official said. Another official told the EU Observer newspaper: "We can agree in principle that we should work on common standards, and interoperability. We want to avoid things being blocked because vaccines are not recognized in one particular country." Maros Sefcovic, a European Commission vice president, has said vaccination could become a condition for travel, like current requirements in many countries for a negative test. "There will be different options how we handle travel," he said last week. He said: "the possibility of the electronic vaccination certificate could be added." .