Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results of Markov modeling of Mtb infection in South African miners and non-miners. (A) distribution of likely numbers of infection episodes in 40 year old miners and non-miners. (B) Specificity of negative TST for innate Mtb resistance in relation to age. (C) Specificity of negative TST for innate Mtb resistance in relation to degree of conferred resistance.
