This morning I read the following excerpt from an online article: "On January 5, Greece's health minister Thanos Plevris placed an expiry date of seven months on vaccine passports. Those who had their last dose of the vaccine more than seven months ago must receive a booster shot. However, at the time of writing, Greece does not have a vaccine mandate to arrivals and visitors can instead show proof of a negative Covid test. Vaccine passports expire after six months."
I am flying from the USA to Athens on 05/20/22 prior to beginning the RS Athens and the Heart of Greece tour several days later. I received my COV-19 booster shot on 10/08/21, more than 7 months prior to my arrival in Greece.
I understand that Greece's vaccination requirements may change before May. My question is: how would the current requirements as outlined above be likely applied in my situation?