It causes flu symptoms - and passengers on planes could expect to be temperature tested upon entry and being quarantined if the traveler displays symptoms. The CDC urges people having recently traveled to Wuhan in the past two weeks to seek medical care immediately in the event of fever, coughing, or difficulty breathing though the symptoms should present most prominently and most quickly in older adults or in anyone with underlying health conditions as they may be at greater risk and only if they’ve come into contact with someone who recently returned from China (in the last two weeks)