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Smallpox
A contagious and often deadly disease caused by the Variola virus, eradicated through a global vaccination campaign.
Allergic Response
An immune system reaction that occurs when the body's defenses mistakenly identify a harmless substance as a threat, releasing histamines that cause symptoms.
HIV Virus
Human Immunodeficiency Virus (HIV) is a virus that attacks and weakens the immune system, increasing the risk of developing infections and certain types of cancer.
Helper T Cells
A type of immune cell that plays a crucial role in the body's immune response by signaling other immune cells to fight off infections.
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