January 2019 in “Galicia Clínica” This article presents a case report of a patient with multiple health conditions and persistent fatigue and dyspnea, but no definitive diagnosis was reached.
25 citations
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January 2022 in “Endocrine journal” This study suggests that hormonal changes may contribute to the persistent symptoms of long COVID, with specific patterns observed in serum hormone levels related to fatigue and sensory dysfunction.
1 citations
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January 2023 in “OALib” In this study, fatigue, loss of taste and smell, and cough were identified as the most common persistent symptoms of post-COVID syndrome among participants in Benghazi, with age and gender being predictors.
August 2025 in “Majalah Obstetri & Ginekologi” In this study, women with PCOS commonly reported persistent long COVID symptoms like fatigue and hair loss; however, vaccination did not worsen PCOS symptoms, reinforcing the importance of completing COVID-19 vaccinations to potentially reduce long COVID risks in this group.
65 citations
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August 2022 in “Viruses” In this study, 70.7% of long-COVID patients reported persistent symptoms three months post-infection, with chronic fatigue, cough, and brain fog being the most common, and female gender and severe initial COVID-19 were identified as risk factors.
13 citations
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January 2024 in “Cadernos de Saúde Pública” This study observed that a significant number of hospitalized COVID-19 patients in Mato Grosso State, Brazil, experienced persistent symptoms like fatigue, memory problems, and hair loss 6 and 12 months after discharge, with higher prevalence among older, lower-income patients and those with pre-existing conditions.
1 citations
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June 2023 in “BMC Pediatrics” In this prospective cohort study conducted in Iraq, 15.2% of children with confirmed COVID-19 experienced persistent symptoms beyond 12 weeks; common symptoms included fatigue and hair fall, with children aged 11-16 at greater risk.
April 2024 in “The Egyptian Family Medicine Journal/The Egyptian Family Medicine Journal ” This randomized controlled trial found that vitamin D supplementation significantly improved various post-COVID-19 symptoms, such as fatigue and sleep disturbances, compared to placebo over two months, emphasizing the role of vitamin D deficiency in persistent symptoms among post-COVID-19 patients.
1 citations
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January 2021 in “Wits Journal of Clinical Medicine” This review discusses the persistence of post-acute COVID-19 symptoms, referred to as "long COVID," impacting multiple organs and impairing quality of life but reports no new clinical results.
16 citations
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July 2012 in “The New England Journal of Medicine” This case report describes a 27-year-old man hospitalized with fatigue, myalgias, weakness, profound weight loss, and abnormal liver function, leading to a diagnosis after chest imaging revealed pneumomediastinum.
39 citations
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March 2022 in “Infection” Many recovered COVID-19 patients in Saudi Arabia still experience symptoms like fatigue and anxiety, especially older adults and those with other health issues.
78 citations
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June 2022 in “Infection” Many COVID-19 survivors experience long-term symptoms like fatigue and sleep issues, needing ongoing medical support.
This study found that a significant portion of the Beyond-COVID cohort reported persistent symptoms, with Omicron variants showing lower rates and severity of symptoms compared to other variants.
1 citations
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October 2012 in “QJM” This case report describes a 47-year-old man with a persistent erythematous scaly plaque on his left lower eyelid, unresponsive to conservative treatment, later diagnosed through biopsy.
14 citations
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February 2021 in “Open Forum Infectious Diseases” In this study, 84% of postacute COVID-19 patients experienced at least one persistent symptom 60 days after hospital discharge, regardless of initial disease severity.
January 2025 in “Directory of Open access Books (OAPEN Foundation)” This source outlines the complex and widespread impact of post-COVID syndromes, highlighting persistent symptoms and the need for interdisciplinary management to address these conditions and their socioeconomic implications as the world moves beyond the pandemic.
80 citations
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February 2021 in “Cureus” This study found that the majority of COVID-19 survivors experienced post-discharge symptoms, with fatigue being the most common, and these symptoms significantly affected quality of life, especially in relation to the severity of their initial infection.
4 citations
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December 2023 in “Research Review” In this retrospective cohort study, researchers reported that 77% of 300 COVID-19 survivors experienced long COVID-19 symptoms such as fatigue and hair loss, with symptoms more likely in females, younger age groups, and hospitalized patients.
4 citations
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October 2021 in “Russian Journal of Cardiology” This study found that one month after discharge, cardiovascular patients previously hospitalized for COVID-19 experienced reduced respiratory symptoms but increased reports of depression, hypercholesterolemia, fatigue, and sleep disorders.
35 citations
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May 2023 in “International Journal of Preventive Medicine” This review discusses the various aspects of long COVID, highlighting its multi-organ impact, including symptoms like fatigue and dyspnea, and suggests that vaccination may play a role in prevention and management. Risk factors and potential therapeutic strategies are also examined.
1 citations
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September 2025 in “Viruses” This study of HCPS survivors in Chile found that 61.9% reported incomplete recovery at 3-6 months post-symptom onset, with ECMO users experiencing more motor dysfunction and palpitations, highlighting the need for multidisciplinary care to address persistent symptoms.
56 citations
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May 2021 in “Journal of infection/The Journal of infection” This study found that 80% of hospitalized COVID-19 survivors experienced at least one post-COVID symptom seven months after discharge, with fatigue, hair loss, and dyspnea being the most common.
35 citations
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January 2022 in “Clinical Infectious Diseases” This study found that healthcare workers with a positive COVID-19 test reported long COVID symptoms more frequently than negative controls, while prior physical activity was linked to reduced neurocognitive and fatigue symptoms.
35 citations
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March 2021 in “BMJ Open Respiratory Research” This study found that among patients hospitalized with COVID-19 in East London, ongoing symptoms were common, with 70% experiencing issues like fatigue and breathlessness, impacting their return to work.
10 citations
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September 2022 in “Psychiatry and Clinical Neurosciences” This review discusses post-acute sequelae of SARS-CoV-2 infection, highlighting the challenges in diagnosing and managing the variety of persistent symptoms, and reports no new clinical results.
1 citations
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May 2023 in “Scientific Reports” In this survey study, 259 hospitalized COVID-19 patients aged 18-59 reported long-term symptoms, with 92.5% experiencing ongoing issues such as hair loss, fatigue, and shortness of breath, highlighting the prevalence of long COVID-19 conditions.
May 2026 in “Journal of Clinical Medicine” In this study, post-COVID-19 patients showed substantial multisystem symptoms six to eight months after infection compared to controls, with a higher burden in non-respiratory areas like fatigue and neurocognitive issues, despite respiratory symptoms largely resolving.
January 2026 in “Revista Eletrônica Acervo Saúde” This study reported that among individuals with long COVID, hematologic disturbances such as inflammation-related anemia, characterized by high hepcidin levels and restricted iron use, were prevalent, contributing to reduced capacity, fatigue, and slow recovery, especially in men and those with severe acute COVID-19.
November 2022 in “Journal of the Endocrine Society” This case study suggests that marijuana use may be associated with low TSH levels without causing thyroid dysfunction in humans.
January 2024 in “The American journal of medicine” In this case report, the authors describe the first documented occurrence of new-onset hypocortisolism after laparoscopic sleeve gastrectomy in a patient, highlighting the need for awareness of this condition among clinicians when patients present with nonspecific symptoms post-bariatric surgery.