Final answer:
Toxoid vaccines are the type that induce immunity against bacterial toxins by using inactivated bacterial toxins to activate humoral immunity without the risk of real toxicity.
Step-by-step explanation:
The types of vaccines that induce immunity against the toxins produced by bacteria are known as toxoid vaccines. Toxoid vaccines are essentially inactivated bacterial toxins, referred to as toxoids. These vaccines specifically activate humoral immunity to neutralize the toxins that play a crucial role in the pathogenesis of certain diseases. For example, vaccines for diseases like diphtheria and tetanus fall under this category. Unlike live attenuated or inactivated vaccines that use whole pathogens or subunit vaccines that use specific antigens, toxoid vaccines use a modified form of the toxin to create an immune response without the risk of actual toxicity.