A client who is 38 weeks pregnant is concerned her baby might get a communicable disease before any immunizations are given. Which physiological mechanism should the nurse use when responding to the mother's concerns?

Neutrophils may be immature in protecting neonates from the risk for infection.

Infants can receive antiinfectants that have not developed resistance to microbes.

Active immunity in newborns is developed fully in the first month of life.

Passive immunity in the first months of life provides protection in newborns.