COVID-19 vaccine update: Over 7 million Americans received latest version
More than seven million Americans have received the most recent version of the COVID vaccine.
This updated shot is designed to combat the newest variants that have emerged.
At the same time last year, 18 million people had already received the latest COVID shot.
This year's rollout has been sluggish, as it has shifted to the private market.
In previous years, the federal government managed the distribution and logistics.