Tetanus is an infectious disease caused by a type of bacterium. This bacterium makes a protein that acts as a toxin and leads to illness. Scientists have developed a vaccine for tetanus that contains a harmless version of the toxin known as a toxoid. The toxoid is made by combining the toxin with the chemical formaldehyde. This chemical attaches to the toxin, making it harmless. Which statement about the tetanus vaccine is correct?
- AAfter vaccination, the toxoid in the vaccine will be ingested by neutrophils and displayed in their cell surface membranes.
- BThe tetanus vaccine containing the toxoid does not contain antigens because it does not contain any cells of the pathogen.
- CThe toxoid protein in the vaccine stimulates the production of antibodies which remain in the blood to provide long-term immunity.
- DWhen formaldehyde binds to the toxin, it causes the toxin to completely change shape.