Victor Herman Frank Haas (February 5, 1916 – June 8, 1983) was an American physician, commissioned officer in the U.S. Public Health Service (PHS).

After joining the Commissioned Corps of the U.S. Public Health Service (PHS) in 1932, he conducted investigations of encephalitis in St. Louis, Missouri, in 1933.

Haas spent the following year at the National Institute of Health, and from 1935 to 1939 served at the PHS Plague Laboratory in San Francisco.

[4][5][6] During World War II, Haas was chief of the Medical Commission to the Yunnan-Burma Railway in China and staff officer in the China-Burma-India Theater.

[8] During this period, scientists developing diphtheria and tetanus antisera observed that some patients exhibited severe hypersensitivity reactions to horse serum injections.