(CNN)CNN readers are asking smart questions about coronavirus every day. So each weekday, we’ll select some of the top questions and get you the answers.Here are some of the most popular recent questions:Q. Does donated blood get screened for coronavirus? At least 4.5 million Americans need donated blood every year, but this is the first time novel coronavirus has been a concern in the nation’s blood supply. “Individuals are not at risk of contracting COVID-19 through the blood donation process or via a blood transfusion since respiratory viruses are generally not known to be transmitted by donation or transfusion,” said the AABB, formerly the American Association of Blood Banks.”The U.S. Food and Drug Administration continues to report that there have been no reported or suspected cases of transfusion-transmitted COVID-19 to date,” the group said. “In addition, no cases of transfusion-transmission were ever reported for the other two coronaviruses that emerged during the past two decades (SARS, the Severe Acute Respiratory Syndrome Coronavirus, and MERS-CoV, which causes Mideast Respiratory Syndrome).”The AABB said routine screening measures are already in place to prevent anyone with clinical respiratory infections from donating blood.But there is one big concern involving blood donations and coronavirus: the possibility

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