Η παραλλαγή Ομικρον δείχνει να «νικάει» και τις ενισχυτικές δόσεις

Syringes are seen during vaccination at the Institute for Health and Food Safety of Zenica, Bosnia and Herzegovina, December 16, 2021. REUTERS/Dado Ruvic - RC2KFR9LNUMD REUTERS