More than a million people have received their first dose of a Covid-19 vaccine in the United States, Centers for Disease Control and Prevention (CDC) director Robert Redfield said Wednesday. “The United States achieved an early but important milestone today — jurisdictions have now reported that more than one million people have received their first dose of Covid-19 vaccine since administration began 10 days ago,” said Redfield. In a call with reporters, Moncef Slaoui, chief advisor of the government’s Operation Warp Speed, said that the objective of immunizing 20 million people this month was “unlikely to be met.” But he said the US was still aiming for 100 million people immunized by the end of the first quarter of 2021, and another 100 million by the second quarter. Three million doses...