Experts Fighting A Moving Target As COVID Mutates

The CDC says nationally, the combined proportion of cases that are Delta is predicted to increase to 93 percent.

As the coronavirus jumps host to host, it finds ways to mutate.  In labs across the country, experts are trying to catch the changes, and keep a pulse on what could be the next threatening variant in the pandemic. The variants can create a moving target and change the game, says Dr. Wesley Long.