Δύο δόσεις εμβολίου παράγουν λιγότερα αντισώματα έναντι της παραλλαγής Ομικρον

Medical syringes and 'omicron' sign displayed in the background are seen in this illustration photo taken in Krakow, Poland on November 28, 2021. (Photo by Jakub Porzycki/NurPhoto via Getty Images) NurPhoto via Getty Images