<unk>  was first recognized during the 1993 outbreak in the Four Corners region of the southwestern United States. It was identified by Dr. Bruce Tempest. It was originally called Four Corners disease, but the name was changed to Sin Nombre virus after complaints by Native Americans that the name "Four Corners" stigmatized the region. It has since been identified throughout the United States.
Hantavirus pulmonary syndrome
Idiopathic pneumonia syndrome
Fungal pneumonia
Community-acquired pneumonia
Viral pneumonia
Influenza 
Influenza
Parasitic pneumonia