For residents of Friuli Venezia Giulia as well as largely for those of other Italian regions (some regions in the south such as Puglia, Calabria and Sicily are excluded) it is possible to travel to Croatia as before the pandemic. For the European Union, in fact, these regions are characterized by the color green. Obviously, there should be no symptoms of the disease at the border (fever at 37.5 °).
The problem, however, could arise when returning from holidays. It is always the rule that there is free roundtrip transit for areas that fall within 60 kilometers from the traveler’s residence, so from Trieste you can get to Rovinj and back without problems either in Croatia or Slovenia.
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For those staying more than 24 hours, however, it should be remembered that, again for the European Union, Istria, Kvarner and the Dalmatian coast up to Split are orange areas, so on return you will need to show a quick swab performed within 24 hours. preceding the transit at the crossing between Croatia and Slovenia.
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Buffer which is also mandatory for returning to Italy even for those who are already vaccinated if they return from Croatia. The swab is mandatory for returning to Italy even at the border between Slovenia and Italy for those who have exceeded 60 kilometers, have stayed in Croatia for more than 24 hours and are not yet vaccinated.