The vaccination requirement will apply to all Silversea voyages globally, with the exception of sailings departing Australia where protocol is still being reviewed.
Starting 18 June, Silver Moon will sail a series of 10-day eastern Mediterranean itineraries from Greece, including calls in Santorini, Paros, Mykonos and Crete.
The new round-trip itineraries will also feature calls in Cyprus, as well as the Israeli city of Haifa. They will go on general sale from Thursday (15 April).
