Which vaccines are commonly administered via subcutaneous injection?

Subcutaneous injections are utilized for specific vaccines that require slower absorption into the bloodstream. The measles, mumps, and rubella (MMR) vaccine, the varicella (chickenpox) vaccine, and the yellow fever vaccine are all designed to be administered in this manner.

These vaccines are formulated to elicit a robust immune response while ensuring that the vaccine components are released gradually, which is critical for optimal effectiveness. The subcutaneous route is ideal for these live attenuated vaccines, allowing for a well-timed immune system engagement without overwhelming the body.

In contrast, the other vaccine combinations mentioned in the other choices are not typically administered via subcutaneous injection. For instance, the influenza and tetanus vaccines are primarily given intramuscularly, which allows for a quicker immune response. Understanding the specific administration routes is important for vaccine efficacy and safety.