WATCH: CNN's Brianna Keilar tears up talking about 500,000 Americans who lost their lives to COVID-19

CNN host Brianna Keilar on Monday got emotional when discussing the 500,000 Americans who have lost their lives to the novel coronavirus. After showing videos telling stories of Americans who had lost loved ones to the disease, Keilar gave an impassioned monologue urging people not to become nu...