Two nights ago, the man in his 30s, checked into this hospital hours after he was diagnosed with the coronavirus. It was five days after he arrived back in the US. He contracted the virus while in Wuhan, even though he didn't go to the animal and seafood market where it originated. He was travelling alone socially, but surrounded by others, and so that is part of the work that's being done to identify who those others In close proximity to him that we would need follow up education and monitoring. Education and monitoring are two of several steps US health officials in the CDC are taking to stop the illness in its tracks. After determining it is transmissible from person to person. Major airports in Atlanta and Chicago will be added as screening centers for passengers arriving from Lu Han. Every person coming from that region will be re-routed through one of these five airports, before they are allowed into the US If this patient is doing well. We will work closely with our partners at the state health department. To continue to ensure that we're taking good care of him. Dr. Nancy messy A of the CDC says that even following the first confirmed us case, the global health community is confident the overall risk of the public is low. Anytime there's emergence of a new disease, it's concerning, but in this particular situation, we've been very proactive. In putting in place measures to help protect the American public. Health officials say the patient will probably be in quarantine for the next 36 hours or so they plan to allow him to go home once his symptoms have passed. Carter Evans, CBS News, Everett, Washington.