The Biology Project: Immunology

Immunology Problem Set

Problem 1: Pathogens and antigens

Tutorial to help answer the question:

A pathogen is a type of antigen

A. True
B. False


Pathogens are disease-causing micro-organisms, including viruses, bacteria, fungi, protozoa, and worms. An antigen is anything that stimulates an immune response. Nearly all pathogens are antigens, stimulating a strong immune response. Antigens are not always pathogens. Pollens that cause hay fever are one of many examples of nonpathogenic antigens.


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