Researchers are working to understand why the novel coronavirus leaves young children virtually untouched, which they say may hold vital clues as to how the virus works. “With respiratory infections like this, we usually see a U-shaped curve on who gets hit the hardest. Young children at one end of the U because their immune systems aren’t developed and old people at the other end because their immune systems grow weaker,” said UTMB’s Vineet Menachery. “With this virus, one side of the U is just completely missing,” MSN News and Democratic Underground also published this story.