Temporary state serum laboratory 1911
* 4 employees
State Serum Laboratory 1924
State Serum Institute 1947
* 20 employees (1947)
* 160 employees (1960)
Public Health Laboratory 1970
* 250 employees (1970)
* 410 employees (1979)
National Public Health Institute 1982
* 420 employees (1982)
* 850 employees (2000)