"It's been a big week of delivery of vaccines," Operation Warp Speed Chief Operating Officer and Army General Gus Perna says after it was announced than more than a million people have received their first dose of a Covid-19 vaccine in the United States. "Today we've allocated 15.5 million doses of vaccine and we are on track to allocate another 4.5 to 5 million next week which will bring us to 20 million doses of vaccine to America before the end of the year," General Perna explains during a briefing in Washington, DC, on Operation Warp Speed and the distribution of the Covid-19 vaccine.