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As coronavirus has quickly spread across the world, so too has the use of face masks. During a pandemic, putting on a mask may be the first thing you think to do in order to protect yourself. But public health researchers have no concrete evidence yet that masks alone significantly reduce a healthy person’s chances of getting sick.And if healthy people buy and use up large quantities of masks, there won't be enough for sick people, who are mostly likely to spread the disease, or for frontline health workers, who more frequently come into contact with the COVID-19 virus as they care for the severely ill. Experts estimate health care systems in the US will need 3.5 billion masks -- quite a bit more than than the national stockpile of about 42 million. But if every person in the U.S. were to wear one mask each day, we'd need a supply nearing 10 billion for just one month. "The most important use of masks is for our health care workers," Dr. Tom Frieden, the president and CEO of Resolve to Save Lives and former head of the Centers for Disease Control and Prevention, tells Newsy. "That will protect them, so they're there for us. And it will protect other patients as well, preventing them from getting infected."The CDC only recommends that people who are sick and their caregivers wear masks. When masks are unavailable, a scarf or bandana can be used. But more importantly, Frieden urges sick people to just stay home. "If you're sick, don't go out. Don't expose others. Even if you're only mildly sick, your illness may kill somebody else." 1568

Beto O'Rourke announced Thursday he is running for president, entering the 2020 race with a call for Americans to look past their differences in order to confront the challenges facing the country."This is a defining moment of truth for this country and for every single one of us," the 46-year-old Democratic former congressman from Texas said in a video announcing his candidacy. "The challenges that we face right now, the interconnected crises in our economy, our democracy and our climate have never been greater.""They will either consume us, or they will afford us the greatest opportunity to unleash the genius of the United States of America," he added.O'Rourke, who is starting a three-day swing through eastern Iowa on Thursday, said he will hold a kick-off rally for his campaign in El Paso, Texas, on March 30.His entrance into the race is the culmination of his two-year, out-of-nowhere rise from a back-bench congressman largely unknown outside El Paso to Democratic stardom as a record-breaking fundraiser, the subject of an HBO documentary and the target of two separate efforts to draft him into the presidential campaign. He joins a crowded field of more than a dozen Democrats vying for the party's nomination.In his announcement video, O'Rourke said he would run a "positive campaign that seeks to bring out the very best from every single one of us, that seeks to unite a very divided country.""We saw the power of this in Texas, where people allowed no difference, however great or however small, to stand between them and divide us," O'Rourke said.O'Rourke last year lost that race in Texas, a bid to oust Republican Sen. Ted Cruz. Still, the Senate race thrust O'Rourke, who served three terms in the House, into the national spotlight. He shattered fundraising records, ending with an million haul, and finished less than 3 percentage points behind Cruz -- much closer than other Democrats had come in recent years against Republicans in a state that's long been a GOP stronghold. But a presidential bid will be a much different test for O'Rourke, who will face serious pressure from the left for the first time in his political career.In an interview with CNN on Wednesday, O'Rourke said the 2020 campaign has "got to be about the big things that we hope to achieve and enact and do for one another."He said that "the most pressing, the most urgent, the most existential challenge of them all is climate. And the scientists, beyond a shadow of a doubt, know that we have at a maximum 12 years in order to enact significant change to meet that threat and reduce the consequences of the decisions that we made in the past -- the consequences that our kids and the generations that follow will bear."O'Rourke also began to lay out what he saw as his top priorities on the eve of his entrance into the 2020 race."Rewriting and signing into law immigration policies that reflect who we are and our values and what we know to be true, grounded in the facts," he said. "Making sure that everybody can see a doctor and live to their full potential. Listening to and then raising up rural communities that for so long have been left behind. Making sure people that are looking for work are able to find it -- that they're equipped with the skills and training and education necessary to maximize their potential. But also investing in people that are already working. ... There are so many people in this country working two and three jobs and struggling to make ends meet.""The destination cannot be Election Night, November 2020. The destination really has to be the realization of everything this country is capable of doing," O'Rourke said.In his Senate race against Cruz, O'Rourke often blurred their policy differences on issues like trade by saying the two agreed. And while O'Rourke took a series of progressive positions -- he argued for criminal justice revisions and marijuana legalization, backed "Medicare-for-all" and said he would support President Donald Trump's impeachment -- the race was primarily a clash of personalities.While O'Rourke will have to prove his policy bona fides, his strengths -- he's a tireless campaigner who won over younger voters -- will serve as a test of whether the Democratic base and its legions of young voters are more interested in inspirational figures or candidates whose ideology matches theirs.O'Rourke's entrance into the presidential race is the culmination of calls for him to explore a bid for national office that began after his closer-than-expected finish in the 2018 Senate campaign.Throughout that race, O'Rourke had insisted he would not run for president -- but that stance shifted after he lost. He acknowledged at a town hall shortly after the election that he was weighing a presidential bid. Then, in December, 4813

As colleges across the country have canceled classes for the remainder of the year in the hopes of limiting the spread of COVID-19, Liberty University in Virginia is welcoming students back to campus.An order by Virginia Gov. Ralph Northam that bans gatherings of more than 10 people means that Liberty won't be able to hold-in person classes. But the school will still hold online classes and plans to allow students to live on-campus for the remainder of the school year.A page on 495

BLOOMINGTON, Ind. — Indiana University Provost Lauren Robel said social media comments by one of the school's professors are "racist, sexist and homophobic," 170

Black Friday is more than two months away. But in a tight labor market, America's retailers and delivery giants are starting to look for seasonal help to handle the holiday shopping rush.Target said Tuesday that it would hire more than 130,000 temporary workers for its stores and distribution centers. Last year, Target hired about 120,000 workers for the holidays. More than 40% of those employees stayed on with Target past the holiday season, according to the company.UPS also announced plans Monday to hire around 100,000 holiday workers, roughly the same number as last year. And Amazon said it would announce its holiday hiring plans in the coming weeks. Amazon hired around 100,000 seasonal workers a year ago.As companies have done in past years, they are relying on higher hourly wages and perks to attract workers. Target will pay an hour to seasonal workers for the first time and offer them discounts at stores. UPS will offer students the opportunity to earn ,300 for college expenses.Finding workers to staff stores and delivery hubs could be difficult. America's unemployment rate remains below 4%.Stores are having trouble filling job vacancies, despite a series of mass closures that have resulted in employment in retail 1258