U.S. President Donald Trump speaks during a news conference in the Rose Garden at the White House June 05, 2020 in Washington, DC.

President Donald Trump said Friday that the U.S. has already produced 2 million coronavirus vaccine doses that are "ready to go" once scientists figure out whether it is safe and effective.

"Tremendous progress is being made on vaccines," Trump said during a Friday morning news conference from the White House. "In fact, we're ready to go in terms of transportation and logistics. We have over 2 million ready to go if it checks out for safety."