January 2023 in “Al-Azhar International Medical Journal /Al-Azhar International Medical Journal” Hair loss is not clearly linked to COVID-19 vaccination in Egyptians.
March 2005 in “Inpharma Weekly” China approved Sinovac's flu vaccine, Japan approved RiUP for female hair loss, and Nippon Kayaku's three cancer drugs.
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December 2021 in “Frontiers in Medicine” Some patients on immunosuppressants had a weaker immune response to the Sinovac-CoronaVac COVID-19 vaccine.
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January 2024 in “Journal of the American Academy of Dermatology” COVID-19 vaccines have been linked to an increase in hair loss conditions.
November 2025 in “Cureus” COVID-19 vaccines caused mostly mild side effects in Bangladeshi medical students, with fewer issues after more doses.