1. Kasper DL, Madoff L, C. Introduction to infectious diseases: Host -Pathogen interactions. In: Kasper DL, Fauci AS, Hauser SL, Longo DL, Jameson JL, Loscalzo J, editors. Harrison's principles of internal medicine. 19 ed. New York: McGraw Hill Education; 2015. p. 1007-12.
2. Gupta I, Guin P. Communicable diseases in the South-East Asia Region of the World Health Organization: towards a more effective response. Bulletin of the World Health Organization. 2010; 88:199-205.
3. Boutayeb A. The burden of communicable and non-communicable diseases in developing countries. Handbook of disease burdens and quality of life measures. 2010:531-46.
4. Lankarani KB, Alavian SM, Peymani P. Health in the Islamic Republic of Iran, challenges and progresses. Med J Islam Repub Iran. 2013; 27(1):42-9.
5. Wester AL, Dunlop O, Melby KK, Dahle UR, Wyller TB. Age-related differences in symptoms, diagnosis and prognosis of bacteremia. BMC Infect Dis. 2013; 13:346.
6. Fernández de la Hoz K, de Mateo S, Regidor E. Trends in infectious diseases mortality in Spain. Gac Sanit. 1999; 13(4):256-62.
7. Dore GJ, Li Y, Plant AJ, Kaldor JM. Trends in infectious disease mortality in Australia, 1979-1994. Med J Aust. 1998; 168(12):601-4.
8. Tavanaee Sani A, Mirkarimi H. Evaluation of Etiology of Infectious Diseases in Elderly Patients Admitted to the Infectious Ward of Imam Reza Hospital. Mashhad Univ Med Scienc, 2011; 54(1): 31-37. doi: 10.22038/mjms.2011.5360
9. Mouton CP, Bazaldua OV, Pierce B, Espino DV. Common infections in older adults. Am FAM Physician. 2001; 63(2):257-68.
10. Armstrong GL, Conn LA, Pinner RW. Trends in Infectious Disease Mortality in the United States during the 20th Century. JAMA. 1999; 281(1):61-6.
11. Golsha R, Golshah E, Jalali Z, Rajabli N, Roshandel G. Final Diagnosis and Outcomes in Old Patients Admitted to the Infectious Diseases Ward. Mashhad Univ Med Scienc. 2012; 55(3):158-63.
12. Hasibi M, Soudbakhsh A., Abadi Z, Mehdipoor P. Mortality rate of infectious disease in relation to holidays: three year study in Imam Khomeini Hospital. Tehran Univ Med J. 2008; 65 (10):50-54
13. Mahmoudi G A, Astaraki P, Anbari K, Khayat pisheh S. Epidemiolgical Survey of Mortality Rate in Patients Admitted to Shohada Hospital of Khorramabad in 2011. Iran J Forensic Med. 2014; 20 (1):393-400
14. Noorizad S, Tabesh H, Mahdian M, Akbari H, Taghadosi M. Causes of Mortality and Morbidity in a Neurosurgery ICU in Kashan 1999-2001. Feyz. 2005; 9 (2):15-20
15. Norman DC, Grahn D, Yoshikawa TT. Fever and aging. J Am Geriatr Soc. 1985; 33(12):859-63.
16. Norman DC, Yoshikawa TT. Fever in the elderly. Infect Dis Clin North Am. 1996 Mar; 10(1):93-9.
17. Almario CV, Metz DC, Haynes K, Yang YX. Risk of community-acquired pneumonia in patients with a diagnosis of pernicious anemia: a population-based retrospective cohort study. Eur J Gastroenterol Hepatol. 2015; 27(11):1259-64.
18. Serraino D, Bidoli E, Piselli P, Angeletti C, Bruzzone S, Pappagallo M, et al. Time trends in infectious disease mortality in Italy: 1969-1999. Epidemiol Prev. 2004; 28(6):322-9.
19. Tellioğlu E, Balcı G, Mertoğlu A. Duration of Stay of Patients with Community-Acquired Pneumonia in Influenza Season. Turk Thorac J. 2018; 12:1-5.
20. Capelastegui A, España PP, Quintana JM, Gallarreta M, Gorordo I, Esteban C, et al. Declining length of hospital stay for pneumonia and postdischarge outcomes. Am J Med. 2008; 121(10):845-52.