Αssociated Press A woman sits as a man leaves after receiving the first dose of the Moderna COVID-19 vaccine, at a new vaccination mega center in Athens, Friday, April 2, 2021. (AP Photo/Thanassis Stavrakis) 4/26/2021 Athens News Agency ATHENS -- Health Secretary General for Primary Health Care Marios Themistokleous provided details about the age groups that will be able to start booking their vaccination appointments during Orthodox Holy Week, speaking at the live briefing on Monday. The online booking platform for citizens aged 30-39 will open on April 27 (Good Tuesday), for those aged 40-44 on April 29 (Good Thursday), and for the 45 to 49 year-olds on May 1 (Good Saturday).