NAVTA Practice Test

Vaccines are usually given subcutaneously, meaning that they are injected directly under the skin. This method is chosen because it allows for the proper delivery and absorption of the vaccine into the body's bloodstream. The other options such as IV, topical, and oral, are not commonly used for administering vaccines because they may not provide the same level of effectiveness and protection. Intravenous (IV) administration involves injecting the vaccine directly into a vein, which can be risky and cause side effects. Topical administration means applying the vaccine on the skin's surface, which may not be as effective as injecting it. Oral administration, or taking the vaccine by mouth, may not be as effective due to the digestive process. Therefore, subcutaneous administration is the preferred and most effective route for delivering vaccines.