Immunology
16 questions tagged Immunology — spanning every one of the seven Ws.
Whose discovery identified the lymphocytes that shape immunity?
Élie Metchnikoff discovered phagocytosis, and Paul Ehrlich developed key ideas about immune cells and antibodies. Together, their work helped explain how the body defends itself.
Whose research first explained how the human immune system distinguishes self from non-self?
Peter Medawar and Frank Macfarlane Burnet developed the concept of acquired immunological tolerance. Their work laid the basis for modern transplant immunology.
Whose discovery first identified human leukocyte antigens (HLA)?
Jean Dausset discovered the first human leukocyte antigens in the 1950s and 1960s. HLA matching became essential for organ transplantation.
Whose discovery first revealed the structure of antibodies?
Gerald Edelman and Rodney Porter independently worked out the basic structure of antibodies in the 1960s. They shared the 1972 Nobel Prize for the discovery.
Whose discovery made antiserum treatment possible for diphtheria and other infections?
Emil von Behring’s work with antitoxins made serum therapy possible. He shared the first Nobel Prize in Physiology or Medicine in 1901 for this breakthrough.
How do antibodies help the immune system fight infection?
Antibodies are proteins made by B cells that bind to specific targets on germs or toxins. By sticking to these targets, they help neutralize pathogens and flag them for destruction.
How do newborns get their immune protection from the mother?
Before birth and after birth, babies receive antibodies from the mother that provide temporary protection. These antibodies help shield the newborn while its own immune system matures.
How do vaccines help the body remember a virus or bacterium for years?
They stimulate memory B cells and T cells that persist after the initial response fades. If the germ returns, those cells can act much faster than the first time.
How do vaccines sometimes cause mild side effects like fever or sore arms?
Those reactions are usually signs that the immune system is responding. They happen because inflammation helps the body build protection.
How does the body recognize a vaccinated germ differently from a real infection?
Vaccines expose the immune system to specific antigens without the full disease process. A real infection usually includes active replication and more widespread tissue damage.
Why does the body make antibodies after vaccination or infection?
Antibodies are proteins made by B cells that attach to a germ or toxin and help block it, mark it for destruction, or neutralize it. They are a key part of long-term immune defense.
What is the HLA system?
The HLA system is a group of genes that help the immune system recognize what belongs to the body and what does not. HLA proteins sit on cell surfaces and present antigen fragments.
What are natural killer cells?
Natural killer cells are immune cells that can destroy infected or cancerous cells without needing prior exposure. They are part of the body’s rapid first-response defense.
What is immune memory after vaccination?
Immune memory is the body's ability to recognize a germ later and respond faster and stronger than the first time. Vaccines create this memory without causing the full disease.
Whose work first identified the mammalian immune system’s major antibody classes?
Köhler and Milstein’s later antibody technology built on earlier immunology, but the antibody classes were identified by many researchers over decades, not one person.
How does the human immune system remember infections?
After an infection, some B cells and T cells become long-lived memory cells. They respond faster if the same pathogen returns.