More than 16.5 million Covid-19 vaccine doses have been administered in the US, about 46% of the 36 million doses distributed, according to data published by the CDC today. 

At least 2.1 million people have received both of the required doses, according to data reported this morning.

West Virginia continues to lead the nation in the number of vaccine doses administered per capita, with more than 8,800 doses administered per 100,000 people. 

Wednesday’s numbers mark a significant increase in the share of doses administered out of the total distributed. Previously that share had stayed below 40%.

However, a note on the CDC’s Covid Data Tracker site indicates that the agency is “refining how the number of doses distributed is reported,” which could affect this calculation. 

The US vaccine rollout has not been a smooth one, with the nation lagging behind several other countries in its Covid-19 vaccination efforts, according to a recent CNN analysis of government data.

CNN is tracking Covid-19’s spread across the US here:

Tracking Covid-19 cases in the US