Which of the following should be confirmed before administering a vaccine?

Before administering a vaccine, it is crucial to confirm the patient's identity and consent. This step ensures that the right individual is receiving the vaccine and that they have provided informed consent for the procedure. Confirming identity helps prevent potential errors such as vaccinating the wrong person, which could lead to serious health consequences. Obtaining consent involves making sure that the patient understands the benefits and risks associated with the vaccine and agrees to receive it.

While aspects like insurance information, vaccination history, and family medical history may be relevant to the overall care and administration of vaccines, the immediate priority before vaccination is to ensure that the individual is correctly identified and has consented to the vaccination process.