Thirty-seven published studies met the inclusion criteria ( Figure 1 ); 14 publications included data on pneumonia incidence and 28 publications reported pneumonia mortality estimates. At least three studies were conducted in Beijing, Guangxi AR, Hubei, Jiangsu, Shanghai, Shanxi, and Sichuan each ( Figure 2 ). Five (36%) of the 14 incidence articles and 3 (11%) of the 28 mortality articles were identified using Pubmed [16, 17, 18, 19, 20, 21, 22, 23] .