Subject: Four years ago
I just got my COVID booster, and in updating my records see that my first COVID shot was March 2021. Four years ago, the World was struggling with COVID. Few people were vaccinated in November 2020. The U.S. economy had 6.7% unemployment and -1% real GDP growth (over the previous year).

COVID-19 vaccine doses administered per 100 people
https://ourworldindata.org/cov...