From the Globe and Mail:
The public-health world has been alarmed since the early 1990s about what's called multidrug-resistant (MDR) tuberculosis.
Drug resistance emerges when people are prescribed the wrong drugs or do not complete a course of treatment, which allows for the natural selection of bacteria that are resistant to the drugs.
MDR is found all over the world, with the fastest growth in cases in China and Russia. It is curable in about half of cases, but patients must take highly toxic drugs for as long as two years to get rid of it. (The other half of people die of the disease within a few years.) ...more
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