| 11. | Resistant strains are being discovered in China at an alarming rate.
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| 12. | Researchers suspect that people may have picked up the resistant strain from food.
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| 13. | Otherwise, the resistant strains of HIV could enter the developed world.
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| 14. | The disease surged back in the 1980s, with new and deadly drug-resistant strains.
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| 15. | This can prompt the infection to reemerge in a drug-resistant strain.
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| 16. | Last week, a drug-resistant strain of cholera emerged in East Africa.
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| 17. | The report estimated that as many as 100 million people carry drug-resistant strains.
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| 18. | The rising tide of resistant strains is complicating efforts to control the disease.
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| 19. | There is also the threat of having a drug-resistant strain emerging.
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| 20. | Thus, drug treatment can lead to the emergence of resistant strains.
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