The latest:There have been more than 1.6 million coronavirus cases in the United States, according to the Johns Hopkins University tally.The U.S. death toll has surpassed 96,000 people, according to Hopkins. A large study published Friday found that seriously ill COVID-19 patients treated with hydroxychloroquine and chloroquine were more likely to die or develop dangerous heart arrhythmias.In an interview with NPR this week, Dr. Anthony