With reintroduced mask mandates, lockdowns, return-to-office delays, and new travel bans, 2021 sometimes resembled 2020. But this year also started with COVID-19 vaccines that were quickly taken by millions of people. Plus, Americans returned to the skies and to work (though not at the same levels from before the pandemic). And there was a new presidential administration.
Here are 21 numbers that shaped this unique, unusual year in the US.
