Study Links Smoking to Millions of TB Deaths
15 November 2011
X-rays from a tuberculosis patient
This is the VOA Special English Health Report.
The World Health Organization recently reported that the number of cases of tuberculosis has been falling since two thousand six. Also, fewer people are dying from TB. But a study by researchers at the University of California, San Francisco, says smoking could threaten this progress.
Nearly twenty percent of all people use tobacco, and millions of non-smokers get sick from breathing the smoke. The new study predicts that smoking will produce an additional thirty-four million TB deaths by twenty-fifty.
Efforts to control the spread of tuberculosis have mainly focused on finding and treating infections. Much less effort has been made to understand the causes. Dr. Anthony Fauci is the director of the United States National Institute of Allergy and Infectious Diseases.
ANTHONY FAUCI: "Despite our control efforts, that you still have more than a million people each year, you know, dying from TB and millions and millions getting infected, we realize it's still a very important problem. So we have to do the practical thing and we have to do the fundamental research things at the same time."
Smoking does not cause tuberculosis; bacteria cause the infection. But the study says smoking affects the nervous system in a way that makes an inactive case of TB more likely to develop into an active one.
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