A health care worker injects the a syringe of the phase 3 vaccine trial, to a volunteer at the Ankara University Ibni Sina Hospital in Ankara, Turkey on October 27, 2020. This vaccine candidate developed against the novel coronavirus (COVID-19) pandemic by the U.S. Pfizer and German BioNTech company.Dougkan Keskinkilic | Anadolu Agency | Getty ImagesThe entire U.S. population could be vaccinated against Covid-19 by June, and there could be enough doses to immunize the rest of the nearly 8 billion people in the world by early to mid-2022, the Trump administration’s vaccine chief said Tuesday.”Hopefully by the middle of the year, …
