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" ... The SARS-CoV-2 virus belongs to the B sarbecovirus clade, along with SARS-CoV. There are also C clade viruses, including MERS-CoV, and A clade viruses, which include many cold-causing coronaviruses. As we search for treatments for SARS-CoV-2, the question is raised: can we find measures to treat all broad classes of coronavirus unilaterally? ... "