Fig. 1From: The association between internal migration and pulmonary tuberculosis in China, 2005–2015: a spatial analysisThe annual average notification rate of SS + PTB and the proportion of emigrants/immigrants at province level in China, 2005–2015. a illustrates the notification rate of SS + PTB. b and c illustrate the proportion of immigrants and emigrants, respectively. TB: Tuberculosis; SS + PTB: Sputum smear-positive pulmonary TBBack to article page