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\subsection{Updates based on new data from national TB prevalence surveys}  By August 2015, final results became available from national TB prevalence surveys implemented between 2012 and 2014 in Ghana, Malawi, Soudan, the Republic of Tanzania, Zambia and Zimbabwe. In Indonesia, burden estimates have been revised upwards (see Box a . Given the size of Indonesia's population and TB burden, this upward revision in burden estimates affects global estimates of the absolute number of TB cases and to a lesser extent TB deaths, but not overall trends. In the other 5 countries with new prevalence survey results, updated estimates are either higher (Ghana, Malawi, Zambia) or lower (Sudan, Zimbabwe) than previous estimates, with overlap in uncertainty intervals except for Malawi.  Prevalence surveys result in estimates of prevalence that are generally more precise and more accurate than previous estimates indirectly derived from estimated incidence and heavily influenced by expert-opinion (see Figure 1). Details are provided in the \textbf{online technical appendix}.    
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