As summer is drawing closer, more countries are changing their entry policies. After Greece, three more countries have announced softening their COVID-related rules and restrictions towards inbound travelers, starting from 1 May.
Switzerland is removing all travel restrictions. No certificate of vaccination, recovery, or testing is required to enter the country.
Same goes for Bulgaria. Previously, only visitors from several neighboring and European countries, including Poland, Israel, Turkey, and Serbia, were granted unrestricted entry
From 1 May, Lithuania declared that its borders are open for anyone, regardless of country of origin and regardless of vaccination status.