if you carefuly read the notes by the hib shot you see that not everyone must get 4 doses. It's a matter of when they started their vaccine series. Carefully review the new feature with JLsolutions & they will enter the rules with you in accordance to when the student got the 1st, 2nd or 3rd shot.... see below:
Haemophilus influenzae type b conjugate vaccine (Hib). (Minimum age: 6 weeks)
a. Children starting the series on time should receive Hib vaccine at 2, 4, 6, and 12 through 15 months of age.
b. If two doses of vaccine are received before 12 months of age, only three doses are required with dose three at 12 through 15 months of age and at least eight weeks after dose two.
c. If dose one is received at ages 12 through 14 months of age, only two doses are required with dose two at least eight weeks after dose one.
d. If dose one is received at 15 months of age or older, only one dose is required.
e. Hib vaccine is not required for children 5 years of age or older.