Immune System Online Quiz

Vaccines work by introducing a weakened or inactivated form of a pathogen to the immune system. This allows the body to develop memory cells, which provide protection if the actual pathogen is encountered later.

Antibodies are proteins produced by the immune system that identify and neutralize pathogens. They act as tags that signal other immune cells to destroy the marked microbe.

Varicella-zoster virus is the specific pathogen responsible for chickenpox. The other options listed are different viruses associated with other conditions.

Strep throat is caused by Streptococcus bacteria. The other options are different genera of bacteria that cause unrelated illnesses.

Inflammation is the body's localized protective response to tissue injury or infection. It is characterized by the classic signs of redness, heat, swelling, and pain.

Euglena is a genus of single-celled eukaryotic organisms, specifically a protist, not a microbe in the context of typical disease-causing pathogens like bacteria or viruses. While microscopic, it is classified differently than the others.