Which immunization protects against chickenpox?

The immunization that protects against chickenpox is indeed a vaccine. Vaccines work by stimulating the immune system to recognize and combat specific pathogens, in this case, the varicella-zoster virus responsible for chickenpox. The varicella vaccine includes a weakened form of the virus, which prompts the body to produce an immune response without causing the actual disease. This prepares the immune system to respond effectively if exposed to the virus in the future.

In contrast, an antitoxin is used to neutralize toxins produced by pathogens rather than to prevent viral infections, a toxoid is a modified toxin used to stimulate immunity against toxin-producing bacteria, and an allergen is a substance that causes allergic reactions. Therefore, none of these alternatives would provide the protective effect against chickenpox that a vaccine does.