Which statement about toxoid vaccines is true?

Which statement about toxoid vaccines is true?

• A. They are vaccines that use live, attenuated toxins.
• B. They use non-toxin antigens to boost immunity.
• C. They require only a single dose to achieve immunity.
• D. They use inactivated toxins to provoke antibody responses.

Answer: (D)

Toxoid vaccines are made from toxins that have been inactivated so they can’t cause illness, yet they keep their shape enough for the immune system to recognize them. This approach trains the body to produce antibodies that specifically neutralize the toxin if the person is exposed later. Because the goal is to generate antibodies against the toxin itself, the vaccine targets the toxin, not other bacterial components. That’s why using inactivated toxins to provoke antibody responses is the correct statement. These vaccines aren’t based on live, attenuated toxins, they aren’t centered on non-toxin antigens, and immunity typically requires multiple doses with booster shots rather than a single dose. Examples include vaccines against diphtheria and tetanus.

Toxoid vaccines are made from toxins that have been inactivated so they can’t cause illness, yet they keep their shape enough for the immune system to recognize them. This approach trains the body to produce antibodies that specifically neutralize the toxin if the person is exposed later. Because the goal is to generate antibodies against the toxin itself, the vaccine targets the toxin, not other bacterial components. That’s why using inactivated toxins to provoke antibody responses is the correct statement. These vaccines aren’t based on live, attenuated toxins, they aren’t centered on non-toxin antigens, and immunity typically requires multiple doses with booster shots rather than a single dose. Examples include vaccines against diphtheria and tetanus.