The biggest vaccination campaign in history is underway. More than 345 million doses have been administered across 121 countries, according to data collected by Bloomberg. The latest rate was roughly 8.74 million doses a day.

More than 345 million doses have been administered in 121 countries.

In the U.S., more Americans have received at least one dose than have tested positive for the virus since the pandemic began. So far, 101 million doses have been given. In the last week, an average of 2.30 million doses per day were administered.