The first clinical trial in the U.S. of a possible coronavirus treatment is underway in Nebraska and is eventually expected to include 400 patients at 50 locations around the world. Half the patients will receive an antiviral medicine while the other half will receive a placebo. Patients who are hospitalized with the coronavirus will be eligible to join the trial if they have moderate symptoms. Currently there are no proven treatments or vaccines for the coronavirus, which has infected more than 80,000 people worldwide and killed more than 2,700, with the overwhelming majority of cases in China.