The “Golden Age” of TB research using rhesus macaques. The timeline illustrates major studies of experimental M. tuberculosis infection in Indian rhesus macaques during the so-called Golden Age from the 1960s to 1970s (12, 17–23). Events are organized chronologically by year of publication. Thus, the 10-year study by Good (17) actually began before the first reported investigation in 1966. Locations of the experiments (red) and the corresponding author (blue) are indicated. Abbreviations: ic, intracutaneous; im, intramuscular; iv, intravenous; sc, subcutaneous; M.tb, M. tuberculosis; NBL, Naval Biological Laboratories; UC, University of California.