CLOSE Without masks and a vaccine, we could reach Herd Immunity from COVID-19, but deaths would skyrocket. We break down the science of it. USA TODAYWith the U.S. approaching 200,000 confirmed COVID-19 deaths and worldwide infections topping 30 million, the Centers for Disease Control and Prevention is now recommending that all people who have been exposed to someone with COVID-19 should get tested, even if they aren’t showing symptoms.The recommendation Friday reverses controversial guidance the agency issued at the end of August, which said that someone who was in close contact (within 6 feet) of an infected person for at least 15 minutes but doesn’t have symptoms does not “necessarily need a test.”Asked about the timeline for a coronavirus vaccine, President Donald Trump on Friday said the U.S. will have manufactured more than 100,000,000 doses of vaccine before the end of the year, with “enough vaccines for every American by April.” But CDC Director Robert Redfield told a Senate panel this week that a vaccine may not be available to the American public until summer or fall 2021.Meanwhile, Texas and Nevada are set to ease restrictions for some businesses beginning this weekend, and four more states began-in person voting Friday.Some significant developments:As in-person voting began


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