Summary: The coronavirus continues to spread across the United States, bringing with it immense economic damage. So far, Congress has been unable to deliver another pandemic relief measure, prompting House Democrats to cancel a planned August recess. But there were signs of hope on Capitol Hill, as top U.S. scientists spoke of encouraging progress toward developing a COVID-19 vaccine. Stephanie Sy reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
