Here’s the math: If the goal is to reach 80% of Americans vaccinated with a 2-dose #covid19 vaccine, it will take 10 years at our current pace. We are at 1 million vaccinations a week. To get to herd immunity by June 2021, we need to be at 3.5 million vaccinations a day. pic.twitter.com/E78e0xg10z

— Leana Wen, M.D. (@DrLeanaWen) December 29, 2020