Fig. 4From: The association between internal migration and pulmonary tuberculosis in China, 2005–2015: a spatial analysisThe internal migration flow of Beijing, Zhejiang, Guangdong, Guizhou, Hubei and Hunan province. a, b and c for immigrant flow, d, e and f for emigrant flow. a, b and c present the immigrant flow of Beijing, Zhejiang, Guangdong over 2005–2015, respectively. d, e and f present the emigrant of Guizhou, Hubei and Hunan over 2005–2015, respectively. TB: Tuberculosis; SS + PTB: Sputum smear-positive pulmonary TBBack to article page