Just 9.2 percent of the U.S. population has been fully vaccinated with a COVID-19 vaccine, the U.S. Centers for Disease Control and Prevention (CDC) estimated on Monday.

President Joe Biden, standing left, visits a COVID-19 vaccination site and watches as Dr. Navjit Goraya gives a vaccine to Air Force Col. Margaret Cope, as from left, Pharmacist Deepika Duggineni, White House COVID-19 Response Coordinator Jeff Zients and Secretary of Veterans Affairs Denis McDonough, right, look on at the VA Medical Center in Washington, Monday, March 8, 2021. (AP Photo)

Over 116 million vaccine doses have been distributed across the United States as of Monday, and more than 92 million doses have been administered, according to the latest CDC data.

About 31 million people have received two doses of vaccines, CDC data show.

There are three COVID-19 vaccines currently authorized for emergency use in the United States by the U.S. Food and Drug Administration (FDA).

The FDA authorized the one developed by American drugmaker Pfizer in partnership with German company BioNTech, and another by American drugmaker Moderna, in December last year.

Johnson &Johnson's COVID-19 vaccine was approved for emergency use on Feb. 27. It is the first single-dose vaccine authorized in the United States.

U.S. President Joe Biden said last week the United States would have enough COVID-19 vaccine doses for every adult American by the end of May, which would dramatically accelerate his timeline previously set for the end of July.