text: The<unk>  was developed because it was better than the original<unk>  vaccine.  It is made by mixing monomeric gp120 with Alum.  Studies showed that the more gp120 you add, the less<unk>  infections the first group for testing had, but the first group was too small to confirm that.
option_0: Subunit HIV vaccine
option_1: Malaria vaccine
option_2: Cancer vaccine
option_3: Ebola vaccines
option_4: Smallpox vaccine
option_5: CMV regimen
option_6: Caries vaccine
option_7: Polio vaccine