Dec. 20 , 2021 -- The Omicron coronavirus variant has been found in dozens of states across the country since it was first identified in South Africa in November, and many may be wondering: Will it upstage Delta and cause a winter surge? Is it still safe to gather with others for the holidays? How is this variant affecting children?Experts addressed those and other questions in a webinar hosted by New York University last week, acknowledging that it will take some time to find out all the crucial facts about Omicron.But in the meantime, here's what's known -- and not...