CHICAGO - The delta variant has quickly gripped the U.S. and now we're learning there may be a delta variant plus, and an epsilon or lambda variant, that could also spread quickly.On Thursday, FOX 32 spoke with the head of the infectious disease division at UI Health for a deeper look at these variants, and how to stop them."This is what viruses do.
Their main mission is to reproduce," said Dr. Richard Novak.In order to reproduce, Novak says the viruses mutate in huge numbers – that's what has happened with the delta variant now sweeping the country."They're basically in competition with one another, so viruses that are more efficient – causing infection, escaping our immune responses – are the ones that are becoming dominant," Novak said.D.