Immunity
The Ability Of The Immune System To Resist A Specific Pathogen After Exposure Or Vaccination.

Vaccine
A Preparation Containing Weakened Or Inactivated Pathogens That Stimulates The Immune System To Build Immunity.

Inflammation
A Protective Response Of The Immune System Characterized By Redness, Heat, And Swelling.

Phagocytosis
A Process In Which Macrophages And Other Cells Engulf And Digest Pathogens.

Macrophage
A Large White Blood Cell That Engulfs And Destroys Pathogens Through Phagocytosis.

White Blood Cell
A Type Of Cell In The Immune System That Helps Defend The Body Against Pathogens.

Antibody
A Protein Produced By Immune Cells That Binds To Specific Antigens To Neutralize Them.

Antigen
A Molecule Recognized As Foreign By The Immune System, Triggering An Immune Response.

Immune System
A Network Of Cells, Tissues, And Organs That Protect The Body From Pathogens.

Host Cell
A Cell That A Virus Infects And Uses To Replicate.