Table 2.

Tuberculous Infection versus Immunoreactivity

	Live M. tuberculosis Present = Tuberculous Infection		No Live M. tuberculosis Present
TB immunoreactive	TB	Tuberculous infection, no disease*†	Cleared*‡
TB nonimmunoreactive	TB	Tuberculous infection, no disease†	Never infected§

Definition of abbreviations: M. tuberculosis = Mycobacterium tuberculosis; TB = tuberculosis.

^*People who are currently offered preventive TB treatment.

^† People who may benefit from preventive TB treatment.

^‡ Or nonspecific TB immunoreactivity.

^§ Or infected and cleared without ever developing immunoreactivity.