Hantavirus
Specifically, Sin Nombre orthohantavirus
Sin Nombre = No name
Outbreak of Sin Nombre in Four Corners region in June 1993
On a Navajo reservation
Including Window Rock AZ
https://www.cdc.gov/mmwr/preview/mmwrhtml/00025007.htm
https://web.archive.org/web/20210201014523/http://nativecases.evergreen.edu/sites/nativecases.evergreen.edu/files/case-studies/Stumpff%20hantavirus.pdf
Same year, October 1993
Trump confronts John McCain about Navajo reservation casinos being mob fronts
https://www.latimes.com/87609328-132.html
https://www.businessinsider.com/trump-john-mccain-casino-mark-salter-2020-10?op=1
Navajo Tourism Department
Window Rock, AZ
https://www.discovernavajo.com/discover-the-navajo-nation/navajo-casinos/
Theory: John McCain is called "No Name" because of his involvement with bioterrorism on natives