Contradicting his own health officials and other experts, President Donald Trump claimed Wednesday that a COVID-19 vaccine would be available as soon as October. He also said that at least 100 million vaccine doses would be distributed in the U.S. by the end of the year.

Trump’s pronouncement came hours after Robert Redfield, director of the Centers for Disease Control and Prevention, testified before a Senate committee about the availability of a potential vaccine. Redfield told lawmakers that while first responders could have limited access to one in November or December, a vaccine would not be “fully available to the American public” until at least “the second or third quarter” of 2021.