Shoulder Injury Related to Vaccine Administration 

Shoulder injury related to vaccine administration (SIRVA) is sometimes reported following administration of vaccine in the deltoid muscle. 

SIRVA occurs when the needle passes over or through the deltoid muscle and is injected into or too close to non-muscular structures in the shoulder. 

The risk of SIRVA is reduced by:

  • Proper injection technique, including site identification
  • Using the appropriate needle length 





Page last reviewed: August 26, 2021