Final answer:
The nurse would inform the parents of an 8-week-old baby with sickle cell disease that penicillin prophylaxis is important to prevent infections, regardless of the baby's age. Prophylactic antibiotics are crucial to protect against severe bacterial infections in babies with sickle cell disease. The nurse can also discuss alternative prophylactic measures with the parents.
Step-by-step explanation:
The nurse would tell the parents of the 8-week-old baby with sickle cell disease that penicillin prophylaxis helps prevent infections in babies with sickle cell disease (a). The baby's age does not exempt them from the need for penicillin prophylaxis (b). Prophylactic antibiotics are crucial to protect against severe bacterial infections in babies with sickle cell disease (c). The nurse would also inform the parents that alternative prophylactic measures can be discussed for their baby (d).