Thailand confirmed on Thursday its first known case of the deadly MERS virus, a 75-year-old man who recently arrived from Oman for treatment of a heart condition. Public Health Minister Rajata Rajatanavin said two laboratories had confirmed the results. The man has been quarantined at the ministry’s infectious diseases facility, he said. He said the patient was traveling with three other family members, who also are being watched at the facility. Public health officials are also monitoring others who were in contact with the man, including nearby passengers on the airplane.