 Just in time to ruin your holiday weekend plans, cases of COVID are now spreading across the country. Dr. William Schaffner is an infectious disease specialist at Vanderbilt. These new COVID variants, they're grandchildren of Omicron, the most common variant, are very, very contagious. And stocks ended higher today to kick off the second half of the year. The Dow adding 50 points. The Nasdaq was up 146. The S&P added 15. This is CBS News.