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.
January 2021 in “Journal of Pakistan Association of Dermatology” This article presents cases of two patients experiencing excessive hair shedding 2 to 3 months after COVID-19 infection, highlighting a possible link to telogen effluvium.
September 2023 in “medRxiv (Cold Spring Harbor Laboratory)” This study found that many conditions in patients with COVID-19 were significantly increased compared to controls, with specific phenotypes identified across different demographic and diagnostic attributes.
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September 2021 in “Anais Brasileiros De Dermatologia” This study found that in patients with telogen effluvium after recovering from COVID-19, earlier alopecia onset was associated with younger age, female gender, hypothyroidism, and more severe coronavirus infections.
July 2024 in “Influenza and Other Respiratory Viruses” This study by Kyung et al. found a significant association between SARS-CoV-2 infection and an increased risk of developing alopecia areata in long COVID patients, with COVID-19 severity and vaccination status impacting this risk.