"I hear we're close to 15 percent. I'm hearing that, and that's terrific," Trump said, apparently referring to the theory of herd immunity.
Herd immunity refers to a situation where enough people in a population have immunity to an infection to be able to effectively stop that disease from spreading.
Some 70% of the U.S. population of 330 million would need to be inoculated to achieve "herd" immunity from the virus.
Trump delivered the remarks at the top of a White House summit on vaccine development and distribution just before signing an executive order intended to ensure priority access for COVID-19 vaccines procured by the U.S. government is given to the American people before assisting other nations.