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The article says "Jana is among the estimated 15% of Russians who
multidrug resistant tuberculosis", and that "The incidence of tuberculosis
Russia is 85 per 100 000 population". As a rough guesstimate, if Russians
be about 60 years old, an annual incidence of 85 per 100 000 would produce
prevalence of around 2500 per 100 000, or 2.5% . . . and that's for TB,
multidrug resistant TB. So presumably the author means that "Jana is among
estimated 15% of Russians with TB who have multidrug resistant TB" - which
not quite the same thing!