title: Mystery virus slow to yield its identity as patient numbers rise.
authors.forename: Helen
authors.initials: H
authors.lastname: Pearson
mesh_terms: D000914:Antibodies, Viral / Q000276:immunology; D002487:Centers for Disease Control and Prevention, U.S.; D017934:Coronavirus / Q000276:immunology / Q000302:isolation & purification; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D010252:Paramyxoviridae; D011014:Pneumonia / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology / Q000821:virology; D045169:Severe Acute Respiratory Syndrome / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology / Q000821:virology*; D014481:United States
chemical_list: D000914:Antibodies, Viral