Note: Biologic sex and weight are directly related to needle length choice; the size of the muscle, the adipose tissue thickness at the injection site, the volume of medication to be administered, and the injection technique also need to be considered (Wolicki, J., & Miller, E. [2020]. Chapter 6. Vaccine administration. In J.Hamborsky, A.Kroger, & C.Wolf [Eds.], Epidemiology and prevention of vaccine-preventable diseases. The pink book [13th ed.]. Centers for Disease Control and Prevention. Public Health Foundation. https://www.cdc.gov/vaccines/pubs/pinkbook/vac-admin.html).

Source: Adapted from Centers for Disease Control and Prevention (CDC). (2021, May 4). Vaccine recommendations and guidelines of the ACIP. General best practice guidelines for immunization: Best practices guidance of the Advisory Committee on Immunization Practices (ACIP). https://www.cdc.gov/vaccines/hcp/acip-recs/general-recs/administration.html; Wolicki, J., & Miller, E. (2020). Chapter 6. Vaccine administration. In J.Hamborsky, A.Kroger, & C.Wolf (Eds.), Epidemiology and prevention of vaccine-preventable diseases. The pink book (13th ed.). Centers for Disease Control and Prevention. Public Health Foundation. https://www.cdc.gov/vaccines/pubs/pinkbook/vac-admin.html