One-third of the world's population is thought to be infected with TB. New infections occur in about 1% of the population each year. In 2014, there were 9.6 million cases of active TB which resulted in 1.5 million deaths. More than 95% of deaths occurred in developing countries. The number of new cases each year has decreased since 2000. About 80% of people in many Asian and African countries test positive while 5–10% of people in the United States population tests positive by the tuberculin test. Tuberculosis has been present in humans since ancient times.
একবিংশ শতাব্দীর শুরু থেকে বিশ্বব্যাপী যক্ষ্মার সংক্রমণ কি বেড়েছে বা কমেছে?
decreased