Coronavirus: How Careful Should We Be?

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What you need to know about coronavirus. Dr. Anthony Fauci from the National Institute of Allergy and Infectious Diseases shares there are currently at least 25 countries that have cases of coronavirus. With confirmed person to person transmission, this respiratory-born illness is very contagious. Infectious disease expert Dr. Ravina Kullar shares that infectious diseases don’t care about borders and passports, which makes containment very difficult.