Four patients who have tested positive for the new strain of coronavirus arrived at Providence Sacred Heart Medical Center on Thursday to receive treatment in the hospital’s special pathogens unit – one of 10 units in the country with federal certifications to treat highly infectious diseases.

The patients, all U.S. citizens, arrived at Spokane International Airport aboard a specialized medical transport plane. The plane made two flights, one in the morning and one in the afternoon, from Travis Air Force Base in Sacramento…