"As the coronavirus outbreak in China continues to spread, having infected over 24,000 people so far, scientists around the world are racing to find a treatment. Most of the people infected with the new coronavirus, dubbed 2019-nCov, have not received a treatment specific to that virus — because there isn't one. In fact, none of the handful of coronaviruses known to infect humans has an approved treatment, and people who are infected typically receive care mainly to help relieve symptoms, according to the U.S. Centers for Disease Control and Prevention (CDC). However, a handful of repurposed drugs, from drugs targeting Ebola to HIV, have already shown promise, according to new findings. Until recently, there were very few effective antivirals, said Stephen Morse, a professor at Columbia University's Mailman School of Public Health. That was especially true for RNA viruses — like 2019-nCov and HIV — which use RNA, rather than DNA, as their genetic material, Morse said. That's changing. "In recent years, perhaps encouraged by the successful development of HIV anti-virals, which proved it might be feasible to do more, our armamentarium has greatly expanded," Morse said. Even so, developing brand-new drugs requires a huge investment of both time and resources, he added. So "while you're waiting for the new miracle drug, it's worthwhile looking for existing drugs that could be repurposed" to treat new viruses, Morse told Live Science..."