Lack of Coronavirus Vaccine, Slumping Economy Squeeze Japan’s Olympics Plans

As the clock ticks on planning for the postponed Tokyo 2020 Olympics, two vicelike forces are converging.

On one side, scientists are racing to find a vaccine for the novel coronavirus, which caused the pandemic that pushed back the Games one year to July 2021. A growing list of medical experts says the typical Summer Olympics, simultaneously massive and international, can’t safely occur without a vaccine. And yet it is far from certain that such a vaccine will be identified, proven effective and widely distributed before…