In an ideal world, the U.S. would be awash in COVID tests. Anyone exposed to COVID-19 could self-test and/or go to a lab or clinic for a test if necessary.

But right now, self-tests are in short supply in many parts of the country.

The Biden administration is pledging to distribute 500 million rapid tests “within weeks,” White House coronavirus response coordinator Jeff Zients said Wednesday, but few other details have been announced. Read more at NPR.