Subacromial-subdeltoid bursitis following COVID-19 vaccination: a case of shoulder injury related to vaccine administration (SIRVA).

Vaccination injection site adverse reactions are usually mild and transient, and post-vaccination musculoskeletal symptoms, such as myalgia and arthralgia, are very common. Shoulder injury related to vaccine administration (SIRVA), defined as shoulder pain and limited range of motion occurring after the administration of a vaccine intended for intramuscular administration in the upper arm, is a well-established condition in the medical literature, yet underreported. In such cases, subacromial-subdeltoid bursitis may occur, leading to shoulder dysfunction and ongoing pain. Millions of doses of vaccines for the prevention of COVID-19 have been administered to adults worldwide during the pandemic. We report a case of subacromial-subdeltoid bursitis after COVID-19 vaccination, related to the unintentional injection of vaccine solution into the bursa resulting in a robust immune-mediated inflammatory reaction.