The U.S. has become the epicenter of the global pandemic, with a total of 141,000 cases and 2,400 deaths as of March 31, according to the World Health Organization. The White House has now acknowledged that the death toll in the country could rise to between 100,000 and 240,000.
Vaccines, such as those being developed by Moderna Therapeutics, Johnson & Johnson, Sanofi and others, will likely arrive too late to change those numbers.
