Question: what vaccines are required in the state of iowa?
Answer: 4 through 5 months of age. 1 dose each of Diphtheria/Tetanus/Pertussis, Polio, Hib, ... 
6 through 11 months of age. 2 doses each of Diphtheria/Tetanus/Pertussis, Polio, Hib, ... 
12 through 18 months of age. ... 
19 through 23 months of age. ... 
24 months of age and older.