WHO Coronavirus Disease (COVID-19) Dashboard [Internet]. World Health Organization; [cited 2023 Jun 12]. Available from: https://covid19.who.int/.

Bonanad C, García-Blas S, Tarazona-Santabalbina F, Sanchis J, Bertomeu-González V, Fácila L, et al. The effect of age on mortality in patients with COVID-19: A meta-analysis with 611,583 subjects. J Am Med Dir Assoc. 2020;21(7):915–8.

Article  PubMed  PubMed Central  Google Scholar 

Aveyard P, Gao M, Lindson N, Hartmann-Boyce J, Watkinson P, Young D, et al. Association between pre-existing respiratory disease and its treatment, and severe COVID-19: a population cohort study. Lancet Respir Med. 2021;9(8):909–23.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Ssentongo P, Ssentongo AE, Heilbrunn ES, Ba DM, Chinchilli VM. Association of cardiovascular disease and 10 other pre-existing comorbidities with COVID-19 mortality: A systematic review and meta-analysis. PLoS ONE. 2020;15:e0238215.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Gao Y, Chen Y, Liu M, Shi S, Tian J. Impacts of immunosuppression and immunodeficiency on COVID-19: A systematic review and meta-analysis. J Infect. 2020;81(2):e93–5.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Fernández-de-Las-Peñas C, Notarte KI, Peligro PJ, Velasco JV, Ocampo MJ, Henry BM, et al. Long-COVID symptoms in individuals infected with different SARS-CoV-2 variants of concern: A systematic review of the literature. Viruses. 2022;14(12):2629.

Article  PubMed  PubMed Central  Google Scholar 

Soriano JB, Murthy S, Marshall JC, Relan P, Diaz JV. A clinical case definition of post-COVID-19 condition by a Delphi consensus. Lancet Infect Dis. 2022;22(4):e102–7.

Article  PubMed  CAS  Google Scholar 

Dangayach NS, Newcombe V, Sonnenville R. Acute neurologic complications of COVID-19 and postacute sequelae of COVID-19. Crit Care Clin. 2022;38(3):553–70.

Article  PubMed  PubMed Central  Google Scholar 

Fan Y, Li X, Zhang L, Wan S, Zhang L, Zhou F. SARS-CoV-2 Omicron variant: recent progress and future perspectives. Signal Transduct Target Ther. 2022;7(1):141.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Willett BJ, Grove J, MacLean OA, Wilkie C, De Lorenzo G, Furnon W, et al. SARS-CoV-2 Omicron is an immune escape variant with an altered cell entry pathway. Nat Microbiol. 2022;7(8):1161–79.

Article  PubMed  PubMed Central  CAS  Google Scholar 

McCallum M, Czudnochowski N, Rosen LE, Zepeda SK, Bowen JE, Walls AC, et al. Structural basis of SARS-CoV-2 Omicron immune evasion and receptor engagement. Science. 2022;375(6583):864–8.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Maslo C, Friedland R, Toubkin M, Laubscher A, Akaloo T, Kama B. Characteristics and outcomes of hospitalized patients in south Africa during the COVID-19 Omicron wave compared with previous waves. JAMA. 2022;327(6):583.

Article  PubMed  CAS  Google Scholar 

Stepanova M, Lam B, Younossi E, Felix S, Ziayee M, Price J, et al. The impact of variants and vaccination on the mortality and resource utilization of hospitalized patients with COVID-19. BMC Infect Dis. 2022;22(1):702.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Willan J, Agarwal G, Bienz N. Mortality and burden of post-COVID-19 syndrome have reduced with time across SARS-CoV-2 variants in haematology patients. Br J Haematol. 2023;201(4):640–4.

Article  PubMed  CAS  Google Scholar 

Cortellini A, Tabernero J, Mukherjee U, Salazar R, Sureda A, Maluquer C, et al. SARS-CoV-2 omicron (B.1.1.529)-related COVID-19 sequelae in vaccinated and unvaccinated patients with cancer: results from the OnCovid registry. Lancet Oncol. 2023;24(4):335–46.

Article  PubMed  PubMed Central  Google Scholar 

Reiner RC, Collins JK, Team C1F, Murray CJ. Forecasting the trajectory of the COVID-19 pandemic under plausible variant and intervention scenarios: A global modelling study [Internet]. SSRN Journal [cited 2023 Jul 13]. Available from: https://ssrn.com/abstract=4126660.

Amanatidou E, Gkiouliava A, Pella E, Serafidi M, Tsilingiris D, Vallianou NG, et al. Breakthrough infections after COVID-19 vaccination: Insights, perspectives and challenges. Metabolism Open. 2022;14:100180.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Zisis SN, Durieux JC, Mouchati C, Perez JA, McComsey GA. The protective effect of coronavirus disease 2019 (COVID-19) vaccination on postacute sequelae of COVID-19: A multicenter study from a large national health research network. Open Forum. Infect Dis. 2022;9(7):ofac228.

Google Scholar 

Hammond J, Leister-Tebbe H, Gardner A, Abreu P, Bao W, Wisemandle W, et al. Oral nirmatrelvir for high-risk, nonhospitalized adults with Covid-19. N Engl J Med. 2022;386(15):1397–408.

Article  PubMed  CAS  Google Scholar 

Najjar-Debbiny R, Gronich N, Weber G, Khoury J, Amar M, Stein N, et al. Effectiveness of Paxlovid in reducing severe coronavirus disease 2019 and mortality in high-risk patients. Clin Infect Dis. 2023;76(3):e342–9.

Article  PubMed  CAS  Google Scholar 

Xie Y, Choi T, Al-Aly Z. Association of treatment with nirmatrelvir and the risk of post–COVID-19 condition. JAMA Intern Med. 2023;183(6):554–64.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Peluso MJ, Anglin K, Durstenfeld MS, Martin JN, Kelly JD, Hsue PY, et al. Effect of oral Nirmatrelvir on long COVID symptoms: 4 cases and rationale for systematic studies. Pathog Immun. 2022;7(1):95–103.

PubMed  PubMed Central  Google Scholar 

Statement on the fifteenth meeting of the IHR (2005) Emergency Committee on the COVID-19 pandemic [Internet]. World Health Organization; [cited 2023 Jun 28]. Available from: https://www.who.int/news/item/05-05-2023-statement-on-the-fifteenth-meeting-of-the-international-health-regulations-(2005)-emergency-committee-regarding-the-coronavirus-disease-(covid-19)-pandemic

Chou SH, Beghi E, Helbok R, Moro E, Sampson J, Altamirano V, et al. Global incidence of neurological manifestations among patients hospitalized with COVID-19-a report for the GCS-NeuroCOVID Consortium and the ENERGY Consortium. JAMA Netw Open. 2021;4(5):e2112131.

Article  PubMed  PubMed Central  Google Scholar 

Spudich S, Nath A. Nervous system consequences of COVID-19. Science. 2022;375(6578):267–9.

Article  PubMed  CAS  Google Scholar 

Solomon T. Neurological infection with SARS-CoV-2 - the story so far. Nat Rev Neurol. 2021;17(2):65–6.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Misra S, Kolappa K, Prasad M, Radhakrishnan D, Thakur KT, Solomon T, et al. Frequency of neurologic manifestations in COVID-19: a systematic review and meta-analysis. Neurology. 2021;97(23):e2269–81.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Zubair AS, McAlpine LS, Gardin T, Farhadian S, Kuruvilla DE, Spudich S. Neuropathogenesis and neurologic manifestations of the coronaviruses in the age of Coronavirus disease 2019: A review. JAMA Neurol. 2020;77(8):1018.

Article  PubMed  PubMed Central  Google Scholar 

Douaud G, Lee S, Alfaro-Almagro F, Arthofer C, Wang C, McCarthy P, et al. SARS-CoV-2 is associated with changes in brain structure in UK Biobank. Nature. 2022;604(7907):697–707.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Kamasak B, Ulcay T, Nisari M, Gorgulu O, Akca V, Alpaslan M, et al. Effects of COVID-19 on brain and cerebellum: a voxel based morphometrical analysis. Bratisl Lek Listy. 2023;124(6):442–8.

PubMed  Google Scholar 

Paolini M, Palladini M, Mazza MG, Colombo F, Vai B, Rovere-Querini P, et al. Brain correlates of subjective cognitive complaints in COVID-19 survivors: A multimodal magnetic resonance imaging study. Eur Neuropsychopharmacol. 2023;68:1–10.

Article  PubMed  CAS  Google Scholar 

Guedj E, Campion JY, Dudouet P, Kaphan E, Bregeon F, Tissot-Dupont H, et al. 18F-FDG brain PET hypometabolism in patients with long COVID. Eur J Nucl Med Mol Imaging. 2021;48(9):2823–33.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Goehringer F, Bruyere A, Doyen M, Bevilacqua S, Charmillon A, Heyer S, et al. Brain 18F-FDG PET imaging in outpatients with post-COVID-19 conditions: findings and associations with clinical characteristics. Eur J Nucl Med Mol Imaging. 2023;50(4):1084–9.

Article  PubMed  Google Scholar 

Venkataramani V, Winkler F. Cognitive deficits in long COVID-19. N Engl J Med. 2022;387(19):1813–5.

Article  PubMed  CAS  Google Scholar 

Zicari S, Sessa L, Cotugno N, Ruggiero A, Morrocchi E, Concato C, et al. Immune activation, inflammation, and non-AIDS co-morbidities in HIV-infected patients under long-term ART. Viruses. 2019;11(3):200.

Article  PubMed  PubMed Central  CAS  Google Scholar 

Pourcher V, Gourmelen J, Bureau I, Bouee S. Comorbidities in people living with HIV: an epidemiologic and economic analysis using a claims database in France. PLoS One. 2020;15(12):e0243529.

Article  PubMed  PubMed Central  CAS