[The stream is slated to start at 9:10 a.m. ET. Please refresh the page if you do not see a player above at that time.]New York Gov. Andrew Cuomo is holding a press briefing Monday as the country launches the massive rollout of Pfizer’s Covid-19 vaccine.Pfizer’s vaccine is the first authorized in the U.S. to prevent the coronavirus, which has killed nearly 300,000 Americans in less than a year.Now that the country has a vaccine deemed safe and effective by the Food and Drug Administration and the Centers for Disease Control and Prevention, the government must quickly distribute it, a logistically daunting challenge.Read CNBC’s live updates to see the latest news on the Covid-19 outbreak.