antigen

Immune system target

An antigen is any substance that triggers an immune response, prompting the body to produce antibodies.

Viruses, bacteria, pollen, and foreign proteins can all act as antigens.

The immune system recognizes antigens as threats and mounts defenses against them.

Vaccines work by introducing harmless antigens that train the body to recognize specific pathogens: The vaccine contains a weakened form of the antigen.

vaccine

immunization

Protective medical injection

adjuvant · attenuated · inactivated · subunit · mRNA vaccine · viral vector · immune response · prophylaxis · herd immunity · toxoid

testing

rapid test

Fast diagnostic yielding immediate results

diagnostic · blood typing · Rh factor · agglutination · screening · sensitivity · specificity · false positive · biomarker

allergy

allergen

Immune response trigger

anaphylaxis · allergic reaction · hives · antihistamine · desensitization · immunotherapy · allergic rhinitis · eczema · scratch test · sensitization

pathogen

capsid

Viral genetic material's casing

contamination · toxin

Categories
Opposites
immune role

antigenantibody

Protein targeting foreign substances

immunoglobulin · B cell · T cell · lymphocyte · phagocyte

immunological outcome

antigenimmunosuppressant

Agent reducing bodily defenses

pathogenic function

antigenvaccine

Disease prevention injection

immunization · immunity · antibody · medicine · cure

Phrases
Family

antigenic, antigens

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