The word "typh" is a phonetically tricky word to spell. The correct pronunciation of the word is /taɪf/, with a long "i" sound. This sound is represented by the letter "y" in the spelling. However, the "ph" at the end of the word can be misleading as it does not make the "f" sound usually associated with this combination of letters. Instead, it represents the voiceless labiodental fricative, which sounds like the "f" in "fish".
Typh-fever.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.