WASHINGTON, May 1 (Xinhua) -- More than 100 million adult Americans have been fully vaccinated against COVID-19 as of Saturday, according to data of the U.S. Centers for Disease Control and Prevention (CDC).
The fully vaccinated account for 30.5 percent of the U.S. population.
More than 144 million Americans received at least one COVID-19 shot, accounting for 43.6 percent of the population, according to the CDC.
Among the fully vaccinated, over 37 million are people 65 years of age or older, accounting for 68.8 percent, CDC data showed.
About 240 million COVID-19 vaccine shots have been administered across the country by Saturday, while more than 308 million COVID-19 vaccine doses have been distributed, CDC data show.
U.S. President Joe Biden has previously set a target to hit 200 million COVID-19 shots by the end of April.
The United States has been ramping up vaccine rollout since last December. There are three COVID-19 vaccines authorized for emergency use in the country.
The U.S. Food and Drug Administration (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 third COVID-19 vaccine that has received FDA's authorization, also the first single dose COVID-19 vaccine available in the United States.
According to CDC data, currently a total of 127 million Pfizer/BioNTech doses and 104 million Moderna doses have been administered in the United States, while 8.2 million Johnson & Johnson shots have been administered.