«Αναποτελεσματικά» τα εμβόλια απέναντι στην Ομικρον χωρίς ενισχυτική δόση

A syringe is filled with a first dose of the Pfizer Covid-19 vaccine at a mobile vaccination clinic during a back to school event offering school supplies, Covid-19 vaccinations, face masks, and other resources for children and their families at the Weingart East Los Angeles YMCA in Los Angeles, California on August 7, 2021. (Photo by Patrick T. FALLON / AFP) (Photo by PATRICK T. FALLON/AFP via Getty Images) AFP via Getty Images