Last Updated: Preparations For Start Of Vaccinations In Greece Speaking from one health centre in Athens, Dr Karabelas Militiadis told The Associated Press that the vaccination process is expected to take between 10 and 15 minutes. On Saturday, Greece will receive the first 9,000 vaccines. Speaking from one health centre in Athens, Dr Karabelas Militiadis told The Associated Press that the vaccination process is expected to take between 10 and 15 minutes. After a patient receives the jab, they will wait in a designated area for around 15 minutes to be checked for possible reactions, a routine step. The vaccination programme will coincide with the National Health Organization's (EODY) continued COVID rapid testing.