Updated 11:52 a.m. ET, November 23, 2020
- AstraZeneca says its experimental coronavirus vaccine developed with the University of Oxford has shown an average efficacy of 70% in large scale trials.
- The first Americans to receive a Covid-19 vaccine could be immunized as early as the second week of December, the White House vaccine chief said.
- The US has recorded over 3 million Covid-19 infections already in November, accounting for more than a quarter of its cases since the pandemic began.