In Vivo is a 1964 novel by American writer Mildred Savage.

In 1946, young, idealistic scientist Tom Cable steers the fiscally conservative Enright Drug and Chemical Company into dangerous financial waters by committing an increasing number of company resources to the research and development of a new broad-spectrum antibiotic.

Supporting Cable in his search for a new broad-spectrum antibiotic are Ade Hale (president), Will Caroline (vice-president for research), Maxwell Strong, and Dr. Mills.

Opposing them are Claude Morrissey (director of biochemistry) and Gil Brainard (vice-president for production).

and generally embodying all that is good while the villains back-stab, bicker and descend into abject immorality.