( CNN ) -- The first patient to be diagnosed with Middle East Respiratory Syndrome , or MERS , in the United States is recovering well and should be able to go home from the hospital soon , doctors said Monday . The patient , an American health care provider who had been working in Saudi Arabia , is not on oxygen and is eating well and walking around , said doctors in Munster , Indiana . Doctors have also tested others who have come into contact with the patient . So far no one else has been diagnosed with the virus . Medical staff will continue to monitor the situation closely . The patient , whose name has not been disclosed due to federal privacy standards , was working at a hospital in Riyadh , Saudi Arabia . He told his doctors that the hospital had MERS patients , although he does not remember working with any of those infected . The man was on a planned visit to Indiana to see his family . He traveled on April 24 and went to a hospital in Indiana with symptoms April 28 . About 50 staffers worked closely with the man , said Dr. Alan Kumar , chief medical information officer with Community Hospital in Indiana . No patients at the Indiana hospital had close contact with the MERS patient , who was in a private triage unit and admitted to a private bed on a general medical floor within three hours of showing up at the facility . His family brought the man in after he complained of flulike symptoms -- shortness of breath and fever . They told the medical staff he had been in Saudi Arabia . `` There was a possible thought initially that it was pneumonia , '' or some other kind of respiratory virus , Kumar said . `` That is why he was in a private room the entire time . '' MERS : 5 things to know . The patient never needed a ventilator but was initially put on oxygen . The hospital knew which staffers had close contact with the patient because it uses electronic tracers on staff members , tracking where they go in the hospital and how much time they would have spent with the man . Between that monitoring and video surveillance , the hospital was able to track the patient 's entire journey through the hospital system , according to Kumar . Both the family and health care workers have all tested negative for the virus and all are on home isolation , officials said . If any of those exposed have to go out , doctors have advised they wear a mask . Doctors will run a second test on both populations since the virus is thought to have a 14-day incubation period . If they still test negative for the virus , they will be considered clear and safe to return to their regular work and duties . Scientists do not know exactly how MERS spreads , according to the Centers for Disease Control and Prevention , but they do n't believe it spreads through casual contact . The virus poses a `` very low risk to the broader general public , '' said Dr. Anne Schuchat , assistant surgeon general with the U.S. Public Health Service and director for the CDC 's National Center for Immunization and Respiratory Diseases , on Friday . MERS mystery : Virus found in camels . Out of an abundance of caution , Indiana health officials and the CDC have acquired the passenger lists from the planes the patient took from Saudi Arabia -- he changed planes in London and landed in Chicago -- and the bus he took to Indiana . Of the 100 or so passengers on the plane , three-fourths have been tested , and none has been shown to be positive for MERS . The patient was not symptomatic at the time of travel , according to the doctors . Health officials are also reaching out to the 10 passengers who shared his bus . Scientists believe MERS spreads through close contact with a patient -- meaning someone would have to have come in contact with some of their bodily fluid . MERS first emerged in 2011 , with the first cases being diagnosed in the Arabian Peninsula in 2012 . There have been 401 confirmed cases in 12 countries , according to the CDC . Of those , 93 people died . Testing for MERS involves looking for the virus ' molecular structure in a patient 's nose or blood . While the patient in Indiana was the first MERS case on U.S. soil , the CDC has been preparing for such a scenario and had been conducting an awareness campaign with hospitals and doctors since MERS emerged . There are no travel restrictions to the Arabian Peninsula ; however , the CDC suggests people who visit there monitor their health and watch for any flulike symptoms . If you do feel unwell after such a trip , be sure to tell your doctor about your travel . There is no vaccine or special treatment for MERS . Doctors said they believe the patient 's quick diagnosis and care dramatically increased his chances for getting better . `` MERS picked the wrong hospital , the wrong state , the wrong country to try to get a foothold , '' said Dr. William VanNess , Indiana state health commissioner . Opinion : Why MERS virus is so scary .
The unidentified man is eating well and walking around , officials say . Those who have come in contact with him have tested negative . More than 400 MERS cases have been reported in 12 countries , the CDC says .