As U.S. coronavirus fatality rate rises to 5 percent, experts are still trying to understand how deadly this virus is

“If, in fact, the case fatality rate is higher than the 1918 flu, then this one has the potential to kill even more people,” said Donald Forthal, an immunologist at the University of California at Irvine. “There’s been nothing like this in my generation. Or my parents’ generation. It was the generation before that that lived through 1918.