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. COUNT 5
QSN1 How much of the entire population of the planet is estimated to be carrying tuberculosis? ANS1 One-third QSN2 How many cases of tuberculosis were active over the course of 2014? ANS2 9.6 million QSN3 In 2014, how many people died from TB? ANS3 1.5 million QSN4 Does the majority of fatalities from TB occur in developing countries or industrialized nations? ANS4 developing countries QSN5 Has TB infection increased or decreased worldwide since the start of the 21st century? ANS5 decreased