ABSTRACT
Coronavirus disease (COVID-19) is a major health crisis with more than 100 million cases and almost 3 million deaths having been reported to date. According to the World Health Organization (WHO), vaccination of the majority of the global population is the most critical strategy to return to normal. Vaccines are approved following meticulous work regarding safety and efficacy;however, very little attention is paid to the injection itself. Shoulder injury related to vaccine administration (SIRVA) is a complication due to erroneous injection. SIRVA can be easily prevented, and with millions of people now having COVID-19 vaccine injections, it is crucial to be aware of this complication. In this article, it was aimed to present 2 cases of SIRVA developing secondary to COVID vaccine injection. In the first case, a 30-year-old female presented with pain and limitation of movement in the right shoulder joint. Her complaints started within the first 24 hours following the COVID vaccine. In MRI examination, bursitis and bone marrow edema were present. In the second case, a 53-year-old female had a painful shoulder joint. Her complaints started approximately one day after the COVID vaccine, similar to the first case, bursitis was observed in the MRI.