AUTHOR=Zhou Mi , Wong Chun Ka , Yeung Wan Yin Winnie , Siu Chung Wah , Yin Lixue TITLE=RETRACTED: Case report: Coronavirus Disease 2019 (COVID-19) modified RNA vaccination-induced Adult-Onset Still's Disease with fulminant myocarditis as initial presentation JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=Volume 10 - 2023 YEAR=2023 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2023.1066699 DOI=10.3389/fcvm.2023.1066699 ISSN=2297-055X ABSTRACT=Myocarditis is a rare complication of Coronavirus Disaese 2019 (COVID-19) vaccinnation. We report a case of elderly female who presented initially with acute myocarditis, fulminant heart failure, and atrial fibrillation after receiving a modified ribonucleic acid (mRNA) vaccine (BNT162b2). Unlike other patients with vaccine-induced myocarditis, she developed persistent fever, sore throat, polyarthalgia, diffuse macular rash, and lymphadenopathy. After extensive investigation, she was diagnosed post-vaccination Adult Onset Still’s Disease. The systemic inflammation gradually subsided after use of non-steroidal anti-inflammatory drug and systemic steroid. She was discharged from hospital with stable hemodynamics. Methotrexate was subsequently given to maintain long term remission.