Paul Fiset (English pronunciation: Fih-ZAY; November 7, 1922 – February 27, 2001) was a Canadian-American microbiologist and virologist.

[1] Fiset was born in Quebec, Canada, and attended Laval University, where he earned a Doctor of Medicine degree in 1949.

In 1964, he joined the faculty at the University of Maryland School of Medicine in Baltimore as an associate professor, becoming a U.S. citizen the following year.

[1][2][3][10] Theodore Woodward, writing for the Armed Forces Epidemiological Board, said that an "important and better understanding of Q fever resulted from the work of Dr. Paul Fiset, who showed that Q fever Rickettsiae could wear several faces, called Phase I and Phase II, a change that was important for vaccine development and accurate diagnosis".

As reported in the Journal of the American Medical Association, the peer-reviewed study said the recipient's diagnosis was confirmed "by positive serologic reactions and isolation of Rickettsia rickettsii from blood after inoculation in animals and tissue culture".

[12] Following a 1979 outbreak of Q fever in California, Fiset conducted a two-year serological testing program at the National Institutes of Health Animal Center.