Volume 12, Issue 1 (Winter 2023)                   J Occup Health Epidemiol 2023, 12(1): 18-27 | Back to browse issues page

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Shabestan R, Amani B, Amani B, Khorramnia S, Zareei S, Parsaie M R, et al . Epidemiological Characteristics of COVID-19 Patients in Mazandaran, Iran, 2021. J Occup Health Epidemiol 2023; 12 (1) :18-27
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1- M.Sc in Epidemiology, Dept. of Biostatistics and Epidemiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. , r-shabestan@alumnus.tums.ac.ir
2- M.Sc in Health Technology Assessment, Dept. of Health Management and Economics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
3- Assistant Prof., Dept. of Anesthesiology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
4- M.Sc in Biochemistry, Dept. of Cell & Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.
5- MD, Health Deputy, Mazandaran University of Medical Sciences, Sari, Iran.
6- B.Sc in Public Health, Health Deputy, Mazandaran University of Medical Sciences, Sari, Iran.
7- M.Sc in Biostatistics, Dept. of Biostatistics and Epidemiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
Article history
Received: 2022/03/12
Accepted: 2023/01/25
ePublished: 2023/03/27
Subject: Epidemiology
Abstract:   (246 Views)

Background: COVID-19 continues to pose a significant healthcare challenge throughout the world. This study aimed to investigate epidemiological characteristics and associated mortality factors among hospitalized patients with COVID-19 in the Mazandaran province.
Materials & Methods: In this descriptive study, the medical information of patients admitted to 39 hospitals in 17 cities in Mazandaran province between February 20, 2020, and February 20, 2021, were initially assessed and then entered the survey based on the study criteria. For data analysis, statistical approaches such as Chi-square and Fisher's exact test were performed at a significance level of 5%.
Results: Out of the initial 34036 patients total patients, 21007 were included in the study with a mean age of 53.75±18.23 years, and 10219(48.6%) were males. The majority of cases and the highest mortality percent belonged to the age groups of 60 to 70 and 70 to 80. The Mortality proportion was 11.6% (n=2431), with a higher value in males than females. Moreover, the highest mortality rate was seen in ICU  (n=2803, 85.7%). Underlying diseases with the highest mortality rate were diabetes  (n=2058, 43%) and chronic heart disease  (n=166, 6.83%). The most common symptoms of illness were fever  (n=9025, 43%), hemoptysis  (n=5911, 28.10%), sore throat  (n=3771, 18%), and low blood pressure  (n=3626, 17.30%).
Conclusion: This study showed a high mortality rate among COVID-19 cases and dissected the related risk factors, including age, gender, underlying diseases, and ICU admission.

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1. Lu H, Stratton CW, Tang YW. Outbreak of pneumonia of unknown etiology in Wuhan, China: The mystery and the miracle. J Med Virol. 2020;92(4):401-2. [DOI] [PMID] [PMCID]
2. Hui DS, Azhar EI, Madani TA, Ntoumi F, Kock R, Dar O, et al. The continuing 2019-nCoV epidemic threat of novel coronaviruses to global health - The latest 2019 novel coronavirus outbreak in Wuhan, China. Int J Infect Dis. 2020;91:264-6. [DOI] [PMID] [PMCID]
3. Paules CI, Marston HD, Fauci AS. Coronavirus Infections - More Than Just the Common Cold. JAMA. 2020;323(8):707-8. [DOI] [PMID]
4. Zhu N, Zhang D, Wang W, Li X, Yang B, Song J, et al. A novel Coronavirus from Patients with Pneumonia in China, 2019. N Engl J Med. 2020;382(8):727-33. [DOI] [PMID] [PMCID]
5. Yang Y, Peng F, Wang R, Yange M, Guan K, Jiang T, et al. The deadly coronaviruses: The 2003 SARS pandemic and the 2020 novel coronavirus epidemic in China. J Autoimmun. 2020;109:102434. [DOI] [PMID] [PMCID]
6. Peeri NC, Shrestha N, Rahman MS, Zaki R, Tan Z, Bibi S, et al. The SARS, MERS and novel coronavirus (COVID-19) epidemics, the newest and biggest global health threats: what lessons have we learned? Int J Epidemiol. 2020;49(3):717-26. [DOI] [PMID] [PMCID]
7. Li Q, Guan X, Wu P, Wang X, Zhou L, Tong Y, et al. Early Transmission Dynamics in Wuhan, China, of Novel Coronavirus–Infected Pneumonia. N Engl J Med. 2020;382(13):1199-207. [DOI] [PMID] [PMCID]
8. Riou J, Althaus CL. Pattern of early human-to-human transmission of Wuhan 2019 novel coronavirus (2019-nCoV), December 2019 to January 2020. Euro surveill. 2020;25(4):2000058. [DOI] [PMID] [PMCID]
9. The Lancet. Emerging understandings of 2019-nCoV. Lancet. 2020;395(10221):311. [DOI]
10. Dargahi A, Gholizadeh H, Poursadeghiyan M, Hamidzadeh Arbabi Y, Hamidzadeh Arbabi MH, Hosseini J. Health - promoting behaviors in staff and students of Ardabil University of Medical Sciences. J Educ Health Promot. 2022;11:283. [DOI]
11. Elrashdy F, Redwan EM, Uversky VN. Why COVID-19 Transmission Is More Efficient and Aggressive Than Viral Transmission in Previous Coronavirus Epidemics? Biomolecules. 2020;10(9):1312 [DOI] [PMID] [PMCID]
12. Asem N, Hassany M, Taema K, Masoud H, Elassal G, Kamal E, et al. Demographic and clinical features associated with in-hospital mortality in Egyptian COVID-19 patients: A retrospective cohort study. Open Access Maced J Med Sci. 2021:21253577. [DOI]
13. Noor AU, Maqbool F, Bhatti ZA, Khan AU. Epidemiology of CoViD-19 Pandemic: Recovery and mortality ratio around the globe. Pak J Med Sci. 2020;36(COVID19-S4):S79-84. [DOI] [PMID] [PMCID]
14. Onder G, Rezza G, Brusaferro S. Case-Fatality Rate and Characteristics of Patients Dying in Relation to COVID-19 in Italy. JAMA. 2020;323(18):1775-6. [DOI] [PMID]
15. Abdollahi E, Champredon D, Langley JM, Galvani AP, Moghadas SM. Temporal estimates of case-fatality rate for COVID-19 outbreaks in Canada and the United States. CMAJ. 2020;192(25):E666-70. [DOI] [PMID] [PMCID]
16. Dil S, Dil N, Maken ZH. COVID-19 Trends and Forecast in the Eastern Mediterranean Region with a Particular Focus on Pakistan. Cureus. 2020;12(6):e8582. [DOI] [PMID] [PMCID]
17. Wang D, Hu B, Hu C, Zhu F, Liu X, Zhang J, et al. Clinical Characteristics of 138 Hospitalized Patients with 2019 Novel Coronavirus–Infected Pneumonia in Wuhan, China. JAMA. 2020;323(11):1061-9. [DOI] [PMID] [PMCID]
18. Adhikari SP, Meng S, Wu Y-J, Mao Y-P, Ye R-X, Wang Q-Z, et al. Epidemiology, causes, clinical manifestation and diagnosis, prevention and control of coronavirus disease (COVID-19) during the early outbreak period: a scoping review. Infect Dis Poverty. 2020;9(1):29. [DOI] [PMID] [PMCID]
19. Soltaninejad M, Babaei-Pouya A, Poursadeqiyan M, Feiz Arefi M. Ergonomics factors influencing school education during the COVID-19 pandemic: A literature review. Work. 2021;68(1):69-75. [DOI] [PMID]
20. Hu Y, Sun J, Dai Z, Deng H, Li X, Huang Q, et al. Prevalence and severity of corona virus disease 2019 (COVID-19): A systematic review and meta-analysis. J Clin Virol. 2020:104371. [DOI] [PMID] [PMCID]
21. Fan C, Lu W, Li K, Ding Y, Wang J. ACE2 Expression in Kidney and Testis May Cause Kidney and Testis Infection in COVID-19 Patients. Front Med (Lausanne). 2021;7:56893. [DOI] [PMID] [PMCID]
22. Chai X, Hu L, Zhang Y, Han W, Lu Z, Ke A, et al. Specific ACE2 Expression in Cholangiocytes May Cause Liver Damage After 2019-nCoV Infection. bioRxiv. 2020:2020-02. [DOI]
23. Kumar VCS, Mukherjee S, Harne PS, Subedi A, Ganapathy MK, Patthipati VS, et al. Novelty in the gut: a systematic review and meta-analysis of the gastrointestinal manifestations of COVID-19. BMJ Open Gastroenterol. 2020;7(1):e000417. [DOI] [PMID] [PMCID]
24. Parasa S, Desai M, Chandrasekar VT, Patel HK, Kennedy KF, Roesch T, et al. Prevalence of Gastrointestinal Symptoms and Fecal Viral Shedding in Patients with Coronavirus Disease 2019: A Systematic Review and Meta-analysis. JAMA Netw Open. 2020;3(6):e2011335. [DOI] [PMID] [PMCID]
25. Merola E, Armelao F, de Pretis G. Prevalence of gastrointestinal symptoms in coronavirus disease 2019: a meta-analysis. Acta Gastroenterol Belg. 2020;83(4):603-15. [PMID]
26. Poursadeqiyan M, Kasiri N, Khedri B, Ghalichi Zaveh Z, Babaei Pouya A, Barzanouni S, et al. The Fear of COVID-19 Infection one Year After Business Reopening in Iranian Society. J Health Sci Surveill Syst. 2022;10(3):284-92. [DOI]
27. Akin H, Kurt R, Tufan F, Swi A, Ozaras R, Tahan V, et al. Newly Reported Studies on the Increase in Gastrointestinal Symptom Prevalence with COVID-19 Infection: A Comprehensive Systematic Review and Meta-Analysis. Diseases. 2020;8(4):41. [DOI] [PMID] [PMCID]
28. Elibol E. Otolaryngological symptoms in COVID-19. Eur Arch Otorhinolaryngol. 2021;278(4):1233-6. [DOI] [PMID] [PMCID]
29. Pascarella G, Strumia A, Piliego C, Bruno F, Del Buono R, Costa F, et al. COVID‐19 diagnosis and management: a comprehensive review. J Intern Med. 2020;288(2):192-206. [DOI] [PMID] [PMCID]
30. Savtale S, Hippargekar P, Bhise S, Kothule S. Prevalence of Otorhinolaryngological Symptoms in Covid 19 Patients. Indian J Otolaryngol Head Neck Surg. 2022;74(Suppl 2):3378-84. [DOI] [PMID] [PMCID]
31. Oxley TJ, Mocco J, Majidi S, Kellner CP, Shoirah H, Singh IP, et al. Large-Vessel Stroke as a Presenting Feature of Covid-19 in the Young. N Engl J Med. 2020;382(20):e60. [DOI] [PMID] [PMCID]
32. Shi S, Qin M, Shen B, Cai Y, Liu T, Yang F, et al. Association of Cardiac Injury with Mortality in Hospitalized Patients with COVID-19 in Wuhan, China. JAMA Cardiol. 2020;5(7):802-10. [DOI] [PMID] [PMCID]
33. Kochi AN, Tagliari AP, Forleo GB, Fassini GM, Tondo C. Cardiac and arrhythmic complications in patients with COVID‐19. J Cardiovasc Electrophysiol. 2020;31(5):1003-8 [DOI] [PMID] [PMCID]
34. Klok FA, Kruip MJHA, van der Meer NJM, Arbous MS, Gommers DAMPJ, Kant KM, et al. Incidence of thrombotic complications in critically ill ICU patients with COVID-19. Thromb Res. 2020;191:145-7. [DOI] [PMID] [PMCID]
35. Cai Q, Huang D, Yu H, Zhu Z, Xia Z, Su Y, et al. COVID-19: Abnormal liver function tests. J Hepatol. 2020;73(3):566-74. [DOI] [PMID] [PMCID]
36. Amani B, Amani B, Zareei S, Zareei M. Efficacy and safety of arbidol (umifenovir) in patients with COVID‐19: A systematic review and meta‐analysis. Immun Inflamm Dis. 2021;9(4):1197-208. [DOI] [PMID] [PMCID]
37. Amani B, Zareei S, Amani B, Zareei M, Zareei N, Shabestan R, et al. Artesunate, imatinib, and infliximab in COVID‐19: A rapid review and meta‐analysis of current evidence. Immun Inflamm Dis. 2022;10(6):e628 [DOI] [PMID] [PMCID]
38. Amani B, Zareei S, Amani B. Rapid Review and Meta‐Analysis of Adverse Events Associated with Molnupiravir in Patients with COVID‐19. Br J Clin Pharmacol. 2022;88(10):4403-11. [DOI] [PMID] [PMCID]
39. Krämer A, Kretzschmar M, Krickeberg K. Principles of Infectious Disease Epidemiology. Mod Infect Dis Epidemiol. 2010:85-99. [DOI] [PMCID]
40. Khajehnasiri F, Zaroushani V, Poursadeqiyand M. Macro ergonomics and health workers during the COVID-19 pandemic. Work. 2021;69(3):713-4. [DOI] [PMID]
41. Asghari E, Rahmani F, Hosseinzadeh M, Mahdavi N, Praskova A, Targhaq S, et al. The Clinical Characteristics of Early Cases with 2019 Novel Coronavirus Disease in Tabriz, Iran. Iran J Health Sci. 2021;9(1):1-11. [Article] [DOI]
42. Jalili Khoshnood R, Ommi D, Zali A, Ashrafi F, Vahidi M, Azhide A, et al. Epidemiological Characteristics, Clinical Features, and Outcome of COVID-19 Patients in Northern Tehran, Iran; a Cross-Sectional Study. Front Emerg Med. 2021;5(1):e11. [Article]
43. Nikpouraghdam M, Jalali Farahani A, Alishiri GH, Heydari S, Ebrahimnia M, Samadinia H, et al. Epidemiological characteristics of coronavirus disease 2019 (COVID-19) patients in IRAN: A single center study. J Clin Virol. 2020;127:104378 [DOI] [PMID] [PMCID]
44. Rezabeigi-Davarani E, Bokaie S, Mashayekhi V, Sharifi L, Faryabi R, Alian Samakkhah S, et al. Epidemiological and Clinical Characteristics of COVID-19 Patients Studied by Jiroft University of Medical Sciences: Southeast of Iran. J Adv Med Biomed Res. 2021;29(136):302-8. [DOI]
45. Sobhani S, Aryan R, Kalantari E, Soltani S, Malek N, Pirzadeh P, et al. Association between Clinical Characteristics and Laboratory Findings with Outcome of Hospitalized COVID-19 Patients: A Report from Northeast Iran. Interdiscip Perspect Infect Dis. 2021;2021:5552138. [DOI] [PMID] [PMCID]
46. Zali A, Gholamzadeh S, Mohammadi G, azizmohammad Looha M, Akrami F, Zarean E, et al. Baseline Characteristics and Associated Factors of Mortality in COVID-19 Patients; An Analysis of 16000 Cases in Tehran, Iran. Arch Acad Emerg Med. 2020;8(1):e70. [PMID] [PMCID]
47. Arefi MF, Babaei AP, Barzanouni S, Ebrahimi S, Salehi AR, Khajehnasiri F, et al. Risk Perception in the COVID-19 pandemic; a health promotion approach. J Educ Health Promot. 2022;11:118. [DOI] [PMID] [PMCID]
48. Ho FK, Petermann-Rocha F, Gray SR, Jani BD, Katikireddi SV, Niedzwiedz CL, et al. Is older age associated with COVID-19 mortality in the absence of other risk factors? General population cohort study of 470,034 participants. PLoS One. 2020;15(11):e0241824. [DOI] [PMID] [PMCID]
49. Biswas M, Rahaman S, Biswas TK, Haque Z, Ibrahim B. Association of Sex, Age, and Comorbidities with Mortality in COVID-19 Patients: A Systematic Review and Meta-Analysis. Intervirology. 2020:1-12. [DOI] [PMID] [PMCID]
50. Noor FM, Islam MM. Prevalence and Associated Risk Factors of Mortality Among COVID-19 Patients: A Meta-Analysis. J Community Health. 2020;45(6):1270-82. [DOI] [PMID] [PMCID]
51. Gomez JMD, Du-Fay-de-Lavallaz JM, Fugar S, Sarau A, Simmons JA, Clark B, et al. Sex Differences in COVID-19 Hospitalization and Mortality. J Womens Health (Larchmt). 2021;30(5):646-53. [DOI] [PMID]
52. Green MS, Nitzan D, Schwartz N, Niv Y, Peer V. Sex differences in the case-fatality rates for COVID-19—A comparison of the age-related differences and consistency over seven countries. Plos One. 2021;16(4):e0250523. [DOI] [PMID] [PMCID]
53. Jin JM, Bai P, He W, Wu F, Liu XF, Han DM, et al. Gender Differences in Patients with COVID-19: Focus on Severity and Mortality. Front Public Health. 2020;8:152. [DOI] [PMID] [PMCID]
54. Peckham H, de Gruijter NM, Raine C, Radziszewska A, Ciurtin C, Wedderburn LR, et al. Male sex identified by global COVID-19 meta-analysis as a risk factor for death and ITU admission. Nat Commun. 2020;11(1):6317. [DOI] [PMID] [PMCID]
55. Bienvenu LA, Noonan J, Wang X, Peter K. Higher mortality of COVID-19 in males: sex differences in immune response and cardiovascular comorbidities. Cardiovasc Res. 2020;116(14):2197-206. [DOI] [PMID] [PMCID]
56. Takahashi T, Ellingson MK, Wong P, Israelow B, Lucas C, Klein J, et al. Sex differences in immune responses that underlie COVID-19 disease outcomes. Nature. 2020;588(7837):315-20. [DOI] [PMID] [PMCID]
57. Zhao G, Xu Y, Li J, Cui X, Tan X, Zhang H, et al. Sex differences in immune responses to SARS-CoV-2 in patients with COVID-19. Biosci Rep. 2021;41(1):BSR20202074. [DOI] [PMID] [PMCID]
58. Bronfman N, Repetto P, Cordón P, Castañeda J, Cisternas P. Gender Differences on Psychosocial Factors Affecting COVID-19 Preventive Behaviors. Sustainability. 2021;13(11):6148. [DOI]
59. Griffith DM, Sharma G, Holliday CS, Enyia OK, Valliere M, Semlow AR, et al. Men and COVID-19: A Biopsychosocial Approach to Understanding Sex Differences in Mortality and Recommendations for Practice and Policy Interventions. Prev Chronic Dis. 2020;17:E63. [DOI] [PMID] [PMCID]
60. Choron RL, Butts CA, Bargoud C, Krumrei NJ, Teichman AL, Schroeder ME, et al. Fever in the ICU: A Predictor of Mortality in Mechanically Ventilated COVID-19 Patients. J Intensive Care Med. 2021;36(4):484-93. [DOI] [PMID] [PMCID]
61. Tharakan S, Nomoto K, Miyashita S, Ishikawa K. Body temperature correlates with mortality in COVID-19 patients. Crit Care. 2020;24(1):298. [DOI] [PMID] [PMCID]
62. de Almeida-Pititto B, Dualib PM, Zajdenverg L, Dantas JR, De Souza FD, Rodacki M, et al. Severity and mortality of COVID 19 in patients with diabetes, hypertension and cardiovascular disease: a meta-analysis. Diabetol Metab Syndr. 2020;12:75. [DOI] [PMID] [PMCID]
63. Harrison SL, Fazio-Eynullayeva E, Lane DA, Underhill P, Lip GYH. Comorbidities associated with mortality in 31,461 adults with COVID-19 in the United States: A federated electronic medical record analysis. PLoS Med. 2020;17(9):e1003321. [DOI] [PMID] [PMCID]
64. Kim DW, Byeon KH, Kim J, Cho KD, Lee N. The Correlation of Comorbidities on the Mortality in Patients with COVID-19: An Observational Study Based on the Korean National Health Insurance Big Data. J Korean Med Sci. 2020;35(26):e243. [DOI] [PMID] [PMCID]
65. Posso M, Comas M, Román M, Domingo L, Louro J, González C, et al. Comorbidities and Mortality in Patients With COVID-19 Aged 60 Years and Older in a University Hospital in Spain. Arch Bronconeumol (Engl Ed). 2020;56(11):756-8. [DOI] [PMID] [PMCID]
66. Ng WH, Tipih T, Makoah NA, Vermeulen JG, Goedhals D, Sempa JB, et al. Comorbidities in SARS-CoV-2 Patients: A Systematic Review and Meta-Analysis. mBio. 2021;12(1):e03647-20. [DOI] [PMID] [PMCID]
67. Corona G, Pizzocaro A, Vena W, Rastrelli G, Semeraro F, Isidori AM, et al. Diabetes is most important cause for mortality in COVID-19 hospitalized patients: Systematic review and meta-analysis. Rev Endocr Metab Disord. 2021;22(2):275-96. [DOI] [PMID] [PMCID]
68. Hui Y, Li Y, Tong X, Wang Z, Mao X, Huang L, et al. The risk factors for mortality of diabetic patients with severe COVID-19: A retrospective study of 167 severe COVID-19 cases in Wuhan. PLoS One. 2020;15(12):e0243602. [DOI] [PMID] [PMCID]
69. Yu B, Li C, Sun Y, Wang DW. Insulin Treatment is Associated with Increased Mortality in Patients with COVID-19 and Type 2 Diabetes. Cell Metab. 2021;33(1):65-77.e2. [DOI] [PMID] [PMCID]
70. Shang J, Wang Q, Zhang H, Wang X, Wan J, Yan Y, et al. The Relationship Between Diabetes Mellitus and COVID-19 Prognosis: A Retrospective Cohort Study in Wuhan, China. Am J Med. 2021;134(1):e6-14. [DOI] [PMID] [PMCID]
71. Zhu L, She ZG, Cheng X, Qin JJ, Zhang XJ, Cai J, et al. Association of Blood Glucose Control and Outcomes in Patients with COVID-19 and Pre-Existing Type 2 Diabetes. Cell Metab. 2020;31(6):1068-77. e3. [DOI] [PMID] [PMCID]
72. Santos A, Magro DO, Evangelista-Poderoso R, Saad MJA. Diabetes, obesity, and insulin resistance in COVID-19: molecular interrelationship and therapeutic implications. Diabetol Metabol Syndr. 2021;13(1):23. [DOI] [PMID] [PMCID]
73. Gupta S, Hayek SS, Wang W, Chan L, Mathews KS, Melamed ML, et al. Factors Associated With Death in Critically Ill Patients with Coronavirus Disease 2019 in the US. JAMA Intern Med. 2020;180(11):1436-47. [DOI] [PMID] [PMCID]
74. Bardi T, Pintado V, Gomez-Rojo M, Escudero-Sanchez R, Azzam Lopez A, Diez-Remesal Y, et al. Nosocomial infections associated to COVID-19 in the intensive care unit: clinical characteristics and outcome. Eur J Clin Microbiol Infect Dis. 2021;40(3):495-502. [DOI] [PMID] [PMCID]
75. Bravata DM, Perkins AJ, Myers LJ, Arling G, Zhang Y, Zillich AJ, et al. Association of Intensive Care Unit Patient Load and Demand With Mortality Rates in US Department of Veterans Affairs Hospitals During the COVID-19 Pandemic. JAMA Netw Open. 2021;4(1):e2034266. [DOI] [PMID] [PMCID]
76. Shi P, Dong Y, Yan H, Zhao C, Li X, Liu W, et al. Impact of temperature on the dynamics of the COVID-19 outbreak in China. Sci Total Environ. 2020;728:138890. [DOI] [PMID] [PMCID]
77. Kifer D, Bugada D, Villar-Garcia J, Gudelj I, Menni C, Sudre C, et al. Effects of Environmental Factors on Severity and Mortality of COVID-19. Front Med (Lausanne). 2021;7:607786. [DOI] [PMID] [PMCID]
78. Caspi G, Shalit U, Kristensen SL, Aronson D, Caspi L, Rossenberg O, et al. Climate effect on COVID-19 spread rate: an online surveillance tool. MedRxiv. 2020. [DOI]
79. Iqbal MM, Abid I, Hussain S, Shahzad N, Waqas MS, Iqbal MJ. The effects of regional climatic condition on the spread of COVID-19 at global scale. Sci Total Environ. 2020;739:140101. [DOI] [PMID] [PMCID]
80. Prata DN, Rodrigues W, Bermejo PH. Temperature significantly changes COVID-19 transmission in (sub) tropical cities of Brazil. Sci Total Environ. 2020;729:138862. [DOI] [PMID] [PMCID]
81. Xie J, Zhu Y. Association between ambient temperature and COVID-19 infection in 122 cities from China. Sci Total Environ. 2020;724:138201. [DOI] [PMID] [PMCID]
82. Jahangiri M, Jahangiri M, Najafgholipour M. The sensitivity and specificity analyses of ambient temperature and population size on the transmission rate of the novel coronavirus (COVID-19) in different provinces of Iran. Sci Total Environ. 2020;728:138872. [DOI] [PMID] [PMCID]

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