To work at a flu clinic as a nurse, you need to be a licensed registered nurse (RN). You also must be licensed to work as a pharmacist. Experience with immunization and biometric screening clinics is preferred. As a flu shot administrator, you must have the training to administer intramuscular injections and work with patients of all age groups, which varies by state requirements. The ability to put a patient at ease is an essential trait. You must also receive the flu shot and stay current on other relevant immunizations. Additional qualifications include the ability to work independently, customer service skills, and written and verbal communication skills.