For 20 million Americans, staying home sick is a luxury. Every year, that many people go to work with a virus or infection because they don’t have paid sick leave, even though research shows that staying home prevents the flu from spreading. And during a nasty flu season like this one—we’re now likely in for a record-setting year—doctors and public health officials urge Americans to take every precaution they can to avoid spreading the potentially deadly virus.

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