Concerns over new strains of the coronavirus are rising across the U.S. Researchers in Ohio say they've discovered two new versions of covid which likely originated right here in the United States. That's in addition to a UK variant already spreading in the country. One Bay Area company, called Helix, is working with the CDC to identify new cases of that UK strain, here in the U.S. For more, we spoke to Dr. James Lu, President & Chief Scientific Officer of Helix.