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By August 2015, final results became available from national TB prevalence surveys implemented between 2012 and 2014 in the following countries:  * *\begin{itemize}  \item  Ghana * \end{itemize}  \begin{itemize}  \item  Malawi * \end{itemize}  \begin{itemize}  \item  Soudan * \end{itemize}  \begin{itemize}  \item  Republic of Tanzania * \end{itemize}  \begin{itemize}  \item  Zambia * \end{itemize}  \begin{itemize}  \item  Zimbabwe \end{itemize}  Prevalence surveys result in estimates of prevalence that are more precise and more accurate than previous estimates indirectly derived from estimated incidence and heavily influenced by expert-opinion.