Transcript for Possible new case of coronavirus identified in Texas
Good evening and it's great to have you with us here on a Thursday night. And we begin tonight with the growing concern amid that new suspected case of the mystery coronavirus right here in the U.S. This time, in Texas. The patient, a student at Texas A&M university, recently back from the city of Wuhan. We have news on his condition tonight, amid questions, was he around other students? As two more cities in China are shut down tonight, nearly 20 million people now there under quarantine. The virus now detected in five countries. Passengers screened at a growing number of airports around the globe. Nearly 600 people sickened and at least 18 dead. And tonight, news of passengers being tested after landing in Los Angeles with possible symptoms as a precaution. And that case in Seattle, a patient quarantined, treated by a robot. ABC's Marcus Moore leads us off from College Station, Texas. Reporter: Tonight, a suspected second case of that deadly coronavirus here in College Station, Texas. A student at Texas A&M university, who recently went to Wuhan, went to the E.R. With symptoms, worried he had the virus. Now self-quarantined inside his The hospital recognized that potential immediately and did all the correct steps. Reporter: Doctors says that young man may have even gone to classes before going to the E.R., but they insist the risk to the public is low. The patient had mild symptoms and is improving, so that is a really good sign. Reporter: At L.A.X., where screening was already underway, a passenger is also being treated for coming down with flu-like symptoms. First responders meeting his flight from Mexico last night. And tonight, that first American patient diagnosed with the virus still in isolation outside Seattle, as doctors try to reach at least 16 people known to have come in contact with him. In just the last week, the virus has now spread to five countries, sickening nearly 600, leaving 18 dead, mainly in China, where the lockdown is now extended beyond Wuhan, to include around 20 million Chinese citizens now banned from leaving three cities. Clinics overwhelmed as patients are screened. Public paces disinfected. Supermarket shelves bare. A city of couple of other cities in China. That's never been done before. This is a giant public health experiment. We hope it's success. And Marcus Moore joining us now. When will doctors have the results for the student in Texas? Reporter: Well, David, the CDC is conducting all of the testing and the samples get sent to Atlanta. Once they arrive, it could take a day or two to know if this is a confirmed case. David?
This transcript has been automatically generated and may not be 100% accurate.