October 2023 in “Dermatology practical & conceptual” This study observed that among 120 patients recovering from COVID-19, severe diffuse hair loss typically began less than two months post-infection, with the majority of patients experiencing a severe degree of hair loss and positive hair pull tests, often alongside vitamin D deficiency.
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 2023 in “Research Square (Research Square)” This study found that patients with COVID-19 infection lasting longer than two weeks experienced more severe post-infection hair loss, with women and older individuals particularly affected.
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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.
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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.