Afolabi AA, Ilesanmi OS. Community engagement for COVID-19 prevention and control: a systematic review. Pub Health Toxicol. 2022;2(2):1-17.

Akhtar S, Das JK, Ismail T, Wahid M, Saeed W, Bhutta ZA. Nutritional perspectives for the prevention and mitigation of COVID-19. Nutr Rev. 2021;79(3):289-300. doi: 10.1093/nutrit/nuaa063. PMID: 33570583; PMCID: PMC7454773

Banerjee M, Pal R, Dutta S. Risk of incident diabetes post-COVID-19: a systematic review and meta-analysis. Prim Care Diabetes. 2022;16(4):591-593. doi: 10.1016/ j.pcd.2022.05.009

Bassatne A, Basbous M, Chakhtoura M, El Zein O, Rahme M, El-Hajj Fuleihan G. The link between COVID-19 and VItamin D (VIVID): a systematic review and meta-analysis. Metabolism. 2021;119:154753. doi: 10.1016/j.metabol.2021.154753.

Bignardi P, Castello P, Aquino B. Association between Vitamin D and COVID-19: a systematic review and meta-analysis. Authorea Preprints. 2022. https:// www.authorea.com/doi/full/10.22541/au.164864554.45248145/v1

Boaz, M. and Kaufman-Shriqui, V., 2023. Systematic Review and Meta-Analysis: Malnutrition and In-Hospital Death in Adults Hospitalized with COVID-19. Nutrients, 15(5), p.1298.

Borsche L, Glauner B, von Mendel J. COVID-19 mortality risk correlates inversely with vitamin D3 status, and a mortality rate close to zero could theoretically be achieved at 50 ng/mL 25(OH)D3: results of a systematic review and meta-analysis. Nutrients. 2021;14;13(10):3596. doi: 10.3390/nu13103596..

Camporesi, G., MJ, P.S. and Sánchez-Muniz, F.J., 2022. Vitamin D and polymorphisms of VDR and GC genes in the severity and mortality from COVID-19. A systematic review. Nutricion Hospitalaria.

Chatterjee P, Nirgude A, Chatterjee PK. Healthy eating–a modifiable contributor to optimize healthy living in the COVID-19 pandemic: a review. J Sci Food Agric. 2022;102(5):1751-1758.

Chiodini I, Gatti D, Soranna D, et al. Vitamin D status and SARS-CoV-2 infection and COVID-19 clinical outcomes. Front Pub Health. 2021; 22; 9:736665. doi: 10.3389/ fpubh.2021.736665. PMID: 35004568; PMCID: PMC8727532

Chiodini I, Gatti D, Soranna D, et al. Vitamin D status and SARS-CoV-2 infection and COVID-19 clinical outcomes. Front Pub Health. 2021; 22; 9:736665. doi: 10.3389/ fpubh.2021.736665. PMID: 35004568; PMCID: PMC8727532

Crafa A, Cannarella R, Condorelli RA, et al. Influence of 25-hydroxy-cholecalciferol levels on SARS-CoV-2 infection and COVID-19 severity: a systematic review and metaanalysis. EClinicalMedicine. 2021;37:100967. doi: 10.1016/j.eclinm.2021.10096

Dadras O, SeyedAlinaghi S, Karimi A, et al. COVID-19 mortality and its predictors in the elderly: a systematic review. Health sci reports. 2022;5(3):e657

Del Giudice MM, Indolfi C, Dinardo G, Decimo F, Decimo A, Klain A. Vitamin D status can affect COVID-19 outcomes also in pediatric population. PharmaNutrition. 2022;22:100319. doi: 10.1016/j.phanu.2022.100319

Dissanayake HA, de Silva NL, Sumanatilleke M, de Silva SDN, Gamage KKK, Dematapitiya C, Kuruppu DC, Ranasinghe P, Pathmanathan S, Katulanda P. Prognostic and therapeutic role of vitamin D in COVID-19: systematic review and meta-analysis. J Clin Endocrinol Metab. 2021 Dec 11:dgab892. doi: 10.1210/clinem/dgab892. Epub ahead of print. PMID: 34894254; PMCID: PMC8689831.

Dramé M, Cofais C, Hentzien M, et al. Relation between Vitamin D and COVID-19 in aged people: a systematic review. Nutrients. 2021;13(4):1339. doi: 10.3390/nu13041339.

Ebrahimzadeh A, Mohseni S, Narimani B, et al. Association between vitamin D status and risk of covid-19 in-hospital mortality: a systematic review and meta-analysis of observational studies. Crit Rev Food Sci Nutr. 2021;1-11. doi: 10.1080/10408398.2021.2012419.

Fakhrolmobasheri M, Mazaheri-Tehrani S, Kieliszek M, et al. COVID-19 and selenium deficiency: a systematic review. Biol Trace Elem Res. 2021;5:1–12. doi: 10.1007/ s12011-021-02997-4.

Fakhrolmobasheri M, Mazaheri-Tehrani S, Kieliszek M, et al. COVID-19 and selenium deficiency: a systematic review. Biol Trace Elem Res. 2021;5:1–12. doi: 10.1007/ s12011-021-02997-4.

Feng, X., Liu, Z., He, X., Wang, X., Yuan, C., Huang, L., Song, R. and Wu, Y., 2022. Risk of Malnutrition in Hospitalized COVID-19 Patients: A Systematic Review and Meta-Analysis. Nutrients, 14(24), p.5267.

Flouchi R, Fikri-Benbrahim K. Prevention of COVID 19 by aromatic and medicinal plants: a systematic review. J Pharma Sci Res. 2020;12(8):1106-1111.

Ghasemian R, Shamshirian A, Heydari K, et al. The role of vitamin D in the age of COVID-19: a systematic review and meta-analysis. Int J Clin Pract. 2021;75(11):e14675. doi: 10.1111/ijcp.14675.

Gigli L. Lifestyle under the light of nutrological and psychological aspects in the COVID-19 pandemic: a systematic review. Int J Nutrology. 2022;15(2)

Halim C, Mirza AF, Sari MI. The association between TNF-α, IL-6, and Vitamin D levels and COVID-19 severity and mortality: a systematic review and meta-analysis. Pathogens. 2022;11(2):195. doi:10.3390/pathogens11020195

Hossain MA, Kim JH. Possibility as role of ginseng and ginsenosides on inhibiting the heart disease of COVID-19: a systematic review. J Ginseng Res. 2022;46(3):321-330. doi: 10.1016/j.jgr.2022.01.003.

Hu Y, Kung J, Cave A, Banh HL. Effects of vitamin D serum level on morbidity and mortality in patients with COVID-19: a systematic review and meta-analysis. J Pharm Pharm Sci. 2022;25:84-92. doi: 10.18433/jpps32590.

Hung KC, Ko CC, Wang LK, et al. Association of prognostic nutritional index with severity and mortality of hospitalized patients with COVID-19: a systematic review and meta-analysis. Diagnostics. 2022;12(7):1515

Hunter J, Arentz S, Goldenberg J, et al. Zinc for the prevention or treatment of acute viral respiratory tract infections in adults: a rapid systematic review and meta-analysis of randomised controlled trials. BMJ Open. 2021;11(11):e047474

James PT, Ali Z, Armitage AE, et al. Could nutrition modulate COVID-19 susceptibility and severity of disease? A systematic review. J Nutr. 2021;151(7):1854-1878. doi: 10.1093/jn/nxab059.

James PT, Ali Z, Armitage AE, et al. The role of nutrition in COVID-19 susceptibility and severity of disease: a systematic review. J Nutr. 2021;151(7):1854-1878. doi: 10.1093/jn/ nxab059.

Jayawardena R, Sooriyaarachchi P, Chourdakis M, Jeewandara C, Ranasinghe P. Enhancing immunity in viral infections, with special emphasis on COVID-19: a review. Diabetes Metab Syndr. 2020;14(4):367-382. doi: 10.1016/j.dsx.2020.04.015.

Jolliffe, D.A., Camargo Jr, C.A., Sluyter, J.D., Aglipay, M., Aloia, J.F., Ganmaa, D., Bergman, P., Bischoff-Ferrari, H.A., Borzutzky, A., Damsgaard, C.T. and Dubnov-Raz, G., 2021. Vitamin D supplementation to prevent acute respiratory infections: a systematic review and meta-analysis of aggregate data from randomised controlled trials. The Lancet Diabetes & Endocrinology, 9(5), pp.276-292.

Jordan T, Siuka D, Rotovnik NK, Pfeifer M. COVID-19 and vitamin D–a systematic review. Slovenian J Public Health. 2022;61(2):124-132.

Kazemi A, Mohammadi V, Aghababaee SK, Golzarand M, Clark CCT, Babajafari S. Association of Vitamin D Status with SARS-CoV-2 Infection or COVID-19 Severity: A Systematic Review and Meta-analysis. Adv Nutr. 2021 Oct 1;12(5):1636-1658. doi: 10.1093/advances/nmab012. Erratum in: Adv Nutr. 2021 Oct 1;12(5):2040-2044. PMID: 33751020; PMCID: PMC7989595.

Kiyumi MH, Kalra S, Davies JS, Kalhan A. The impact of vitamin D deficiency on the severity of symptoms and mortality rate among adult patients with COVID-19: a systematic review and meta-analysis. Indian J Endocrinol Metab. 2021;25(4):261-282. doi: 10.4103/ijem.ijem_115_21.

Li, D., Jin, S. and Lu, S., 2022. Association of physical activity and the risk of COVID-19 hospitalization: a dose-response meta-analysis. medRxiv, pp.2022-06.

Liu N, Sun J, Wang X, Zhang T, Zhao M, Li H. Low vitamin D status is associated with coronavirus disease 2019 outcomes: a systematic review and meta-analysis. Int J Infect Dis . 2021;104:58-64. doi: 10.1016/j.ijid.2020.12.077

Luo S, Liang Y, Wong THT, Schooling CM, Au Yeung SL. Identifying factors contributing to increased susceptibility to COVID-19 risk: a systematic review of Mendelian randomization studies. Int J Epidemiol. 2022;51(4):1088-1105

Luo S, Liang Y, Wong THT, Schooling CM, Au Yeung SL. Identifying factors contributing to increased susceptibility to COVID-19 risk: a systematic review of Mendelian randomization studies. Int J Epidemiol. 2022;51(4):1088-1105.

Mahmood R, McLaren S. A systematic review investigating the risk of COVID-19 severity and mortality associated with vitamin D sufficiency and deficiency within the adult population. Proc Nutr Soc. 2022; 81(OCE1).

Mazaheri-Tehrani S, Mirzapour MH, Yazdi M, Fakhrolmobasheri M, Abhari AP. Serum vitamin D levels and COVID-19 during pregnancy: a systematic review and metaanalysis. Clinical Nutrition ESPEN. 2022;51:120-127. doi: 10.1016/j.clnesp.2022.09.008

Mazidimoradi A, Alemzadeh E, Alemzadeh E, Salehiniya H. The effect of polyunsaturated fatty acids on the severity and mortality of COVID patients: a systematic review. Life Sci. 2022;299:120489. doi: 10.1016/j.lfs.2022.120489.

Migliorini F, Vaishya R, Eschweiler J, Oliva F, Hildebrand F, Maffulli N. Vitamins C and D and COVID-19 susceptibility, severity and progression: an evidence based systematic review. Medicina. 2022;58(7):941

Mirzay-Razaz J, Hassanghomi M, Ajami M, Koochakpoor G, Hosseini-Esfahani F, Mirmiran P. Effective food hygiene principles and dietary intakes to reinforce the immune system for prevention of COVID-19: a systematic review. BMC Nutr. 2022;8(1):1-13

Mishra P, Parveen R, Bajpai R, Agarwal N. Vitamin D deficiency and comorbidities as risk factors of COVID-19 infection: a systematic review and meta-analysis. J Prev Med Public Health. 2022;55(4):321-333. doi: 10.3961/jpmph.21.640

Moore E, Fadel A, Lane KE. The effects of consuming a Mediterranean style diet on associated COVID-19 severity biomarkers in obese/overweight adults: a systematic review. Nutr Health. 2022;28(4):647-667. doi: 10.1177/02601060221127853.

Moore, E., Fadel, A. and Lane, K.E., 2022. The effects of consuming a Mediterranean style diet on associated COVID-19 severity biomarkers in obese/overweight adults: A systematic review. Nutrition and Health, 28(4), pp.647-667.

Munshi R, Hussein MH, Toraih EA, et al. Vitamin D insufficiency as a potential culprit in critical COVID-19 patients. J Med Virol. 2021;93(2):733-740. doi: 10.1002/jmv.26360.

Nouruzi S, Vasheghani Farahani A, Rezaeizadeh H, Ghafouri P, Ghorashi SM, Omidi N. Platelet aggregation inhibition: an evidence-based systematic review on the role of herbs for primary prevention based on randomized controlled trials. Iran J Med Sci . 2022;47(6):505-516.

Pechlivanidou E, Vlachakis D, Tsarouhas K, et al. The prognostic role of micronutrient status and supplements in COVID-19 outcomes: a systematic review. Food Chem Toxicol. 2022;162:112901. doi: 10.1016/j.fct.2022.112901

Pechlivanidou E, Vlachakis D, Tsarouhas K, et al. The prognostic role of micronutrient status and supplements in COVID-19 outcomes: a systematic review. Food Chem Toxicol. 2022;162:112901. doi: 10.1016/j.fct.2022.112901

Pereira M, Dantas Damascena A, Galvão Azevedo LM, de Almeida Oliveira T, da Mota Santana J. Vitamin D deficiency aggravates COVID-19: systematic review and metaanalysis. Crit Rev Food Sci Nutr. 2022;62(5):1308-1316. doi: 10.1080/10408398.2020.1841090.

Petrelli F, Luciani A, Perego G, Dognini G, Colombelli PL, Ghidini A. Therapeutic and prognostic role of vitamin D for COVID-19 infection: a systematic review and metaanalysis of 43 observational studies. J Steroid Biochem Mol Biol. 2021;211:105883. doi: 10.1016/j.jsbmb.2021.105883.

Petrelli, F., Oldani, S., Borgonovo, K., Cabiddu, M., Dognini, G., Ghilardi, M., Parati, M.C., Petro’, D., Dottorini, L., Rea, C. and Lonati, V., 2023. Vitamin D3 and COVID-19 Outcomes: An Umbrella Review of Systematic Reviews and Meta-Analyses. Antioxidants, 12(2), p.247.

SeyedAlinaghi, S., Karimi, A., Pashaei, Z., Shobeiri, P., Janfaza, N., Behnezhad, F., Ghasemzadeh, A., Barzegary, A., Arjmand, G., Noroozi, A. and Shojaei, A., 2023. Post-Exposure Prophylaxis for COVID-19: A Systematic Review. Infectious Disorders Drug Targets.

Shah K, Varna VP, Pandya A, Saxena D. Low vitamin D levels and prognosis in a COVID-19 pediatric population: a systematic review. QJM. 2021;114(7):447-453. doi: 10.1093/qjmed/hcab202.

Shah K, Varna VP, Sharma U, Mavalankar D. Does vitamin D supplementation reduce COVID-19 severity? : a systematic review. QJM. 2022;115(10):665-672. doi: 10.1093/ qjmed/hcac040

Shokri-Mashhadi N, Kazemi M, Saadat S, Moradi S. Effects of select dietary supplements on the prevention and treatment of viral respiratory tract infections: a systematic review of randomized controlled trials. Exp Rev Respir Med. 2021;15(6):805-821. doi: 10.1080/17476348.2021.1918546

Sloan KP, Sloan LA, Goulart RA, et al. Effects of Vitamin D in the prophylaxis and treatment of COVID-19: a systematic review. Med Res Archives. 2022;10(6).

Smit M, Marinosci A, Agoritsas T, Calmy A. Prophylaxis for COVID-19: a systematic review. Clin Microbiol Infect. 2021;27(4):532-537
Szarpak L, Rafique Z, Gasecka A, et al. A systematic review and meta-analysis of effect of vitamin D levels on the incidence of COVID-19. Cardiol J. 2021;28(5):647-654. doi: 10.5603/CJ. a2021.0072.

Tentolouris N, Samakidou G, Eleftheriadou I, Tentolouris A, Jude EB. The effect of vitamin D supplementation on mortality and intensive care unit admission of COVID-19 patients. a systematic review, meta-analysis and meta-regression. Diabetes Metab Res Rev. 2022; 38(4):e3517

Teshome A, Adane A, Girma B, Mekonnen ZA. The impact of Vitamin D level on COVID-19 infection: systematic review and meta-analysis. Front Pub Health. 2021;9:624559. doi: 10.3389/fpubh.2021.624559.

Vallish BN, Dang D, Dang A. Nature and mechanism of immune boosting by Ayurvedic medicine: a systematic review of randomized controlled trials. World J Methodol. 2022;12(3):132

Vaughan M, Trott M, Sapkota R, et al. Changes in 25-hydroxyvitamin D levels postvitamin D supplementation in people of Black and Asian ethnicities and its implications during COVID-19 pandemic: a systematic review. J Hum Nutr Diet. 2021;35(5):995-1005. doi:10.1111/jhn.12949

Vlieg-Boerstra B, de Jong N, Meyer R, et al. Nutrient supplementation for prevention of viral respiratory tract infections in healthy subjects: a systematic review and metaanalysis. Allergy. 2021;77(5):1373-1388. doi: 10.1111/all.15136.

Wang MX, Gwee SXW, Pang J. Micronutrients deficiency, supplementation and novel Coronavirus infections—a systematic review and meta-analysis. Nutrients. 2021;13(5):1589. doi: 10.3390/nu13051589.

Wang Y, Nan L, Hu M, et al. Significant association between anemia and higher risk for COVID-19 mortality: a meta-analysis of adjusted effect estimates. Am J Emerg Med. 2022;58:281-285

Widowati AR, Sutrisno S. Zinc deficiency as predictor of COVID-19 severity: a systematic review and meta-analysis. Asian J Health Res. 2022;1(2):75-79.