sentences:  have noted that wide-scale interventions have not had their desired effect, especially with regard to the spread of drug-resistant strains of TB.There are several elements of the Russian prison system that enable the spread of MDR-TB and heighten its severity.Overcrowding in prisons is especially conducive to the spread of tuberculosis; an inmate in a prison hospital has (on average) 3 meters of personal space, and an inmate in a correctional colony has 2 meters.