Ochoa-Gondar O, Hospital I, Vila-Corcoles A, Aragon M, Jariod M, de Diego C, Satue E; EPIVAC Study Group. Prevalence of high, medium and low-risk medical conditions for pneumococcal vaccination in Catalonian middle-aged and older adults: a population-based study. BMC Public Health. 2017 Jun 29;17(1):610. doi: 10.1186/s12889-017-4529-8. PMID: 28662648; PMCID: PMC5492923
Ramirez, J.A. et al. Adults hospitalized with pneumonia in the United States: Incidence, Epidemiology, and Mortality. Clin Infect Dis. 2017; 65(11): 1-7. https://academic.oup.com/cid/article/65/11/1806/4049508. Accessed in 12 Aug 2020. *Calculation of relative incidence (not included in publication). The average incidences reported in Ramirez et al. for adults aged <50 years and those aged 65 years and older were weighted to the estimated 2015 US population using data from the US census.
Al Ghizawi, G.J., Al Sulami, A.A. & Al Taher, S.S. (2007). Profile of community- and hospital-acquired pneumonia cases admitted to Basra General Hospital, Iraq. EMHJ - Eastern Mediterranean Health Journal. 2007; 13 (2): 230-242.
McLaughlin, J.M., et al. Effectiveness of 13-Valent Pneumococcal Conjugate Vaccine Against Hospitalization for Community-Acquired Pneumonia in Older US Adults: A Test-Negative Design. Clin Infect Dis. 2018 Nov 15; 67(10): 1498–1506. https://doi.org/10.1093/cid/ciy312. Accessed in 12 Aug 2020.
Baskaran, V. et al. Effect of tobacco smoking on the risk of developing community acquired pneumonia: A systematic review and meta-analysis. PLoS One. 2019;14(7):e0220204. https://doi.org/10.1371/journal.pone.0220204. Accessed in 12 Aug 2020.