Scientists are racing to understand the Omicron variant of covid-19 and find out just how dangerous it really is. Omicron, dubbed a variant of concern by the WHO, was first detected in South Africa last week and has already spread to multiple countries, including the UK, Canada, Australia and more. Dr. Jonathan Javitt, CEO of Nrx and adjunct professor at Johns Hopkins School of Medicine, joined Cheddar to discuss what we know and don't know about this new variant.