What is the preferred site for administering DPT vaccine in infants?

Correct option is C

Sol. The Vastus Lateralis muscle is the preferred site for intramuscular injections like DPT vaccine in infants because it is large, well-developed, and away from major nerves and blood vessels. This muscle is located on the front side of the thigh and allows for safe administration. Other gluteal muscles are avoided in infants due to the risk of sciatic nerve injury and underdeveloped muscle tissue. The use of the wrong site can lead to complications like nerve palsy or abscess formation.
Explanation of each option:
· (a) Dorso gluteal Muscle – This site is close to the sciatic nerve, making it risky in infants. It may also have more fat, reducing vaccine absorption. WHO does not recommend this site for infants due to these concerns.
· (b) Gluteus Maximus – This muscle is poorly developed in infants and carries a high risk of incorrect injection into fatty tissue. Improper absorption or nerve damage may result.
· (c) Vastus Lateralis – Correct Answer. It is well-developed from birth, has fewer major nerves nearby, and is considered the safest site for infant vaccination. Health professionals are trained to use this site during immunization programs.
· (d) Gluteus Medius – Although safer than gluteus maximus, it is still not the first choice in infants. It is sometimes used in older children or adults for vaccines like hepatitis B.