William Wallace: Your Immune System Doesn’t only Defend, it Remembers
William Wallace, Founder and Director of Product Development and Scientific Affairs, posted on LinkedIn:
”Your immune system doesn’t only defend, it remembers
This diagram maps how the body’s innate and adaptive immune systems work together to identify, attack, and remember pathogens. It shows how different immune cells, antibodies, and signaling molecules coordinate to protect against infection while maintaining balance.
1. Innate immunity: the immediate response
The innate system acts within minutes, providing broad defense through physical, chemical, and cellular barriers.
– Example: Skin, mucus, and stomach acid block pathogens, while macrophages, neutrophils, and natural killer cells identify and destroy invaders using pattern-recognition receptors.
– Example: The complement cascade amplifies inflammation and flags pathogens for destruction by immune cells.
2. Adaptive immunity: the targeted response
The adaptive system learns to recognize specific antigens and produces lasting protection through specialized B and T cells.
– Example: B cells release antibodies (IgM, IgG, IgA, IgE, IgD) that neutralize toxins and tag microbes for clearance.
– Example: T cells coordinate and execute defense-helper T cells activate macrophages and B cells, while cytotoxic T cells trigger apoptosis in infected cells.
3. Antibody specialization and immune memory
Each antibody class has a unique role in defense and long-term immunity.
– Example: IgM is the first antibody made in infection, IgG provides long-term protection and crosses the placenta, IgA guards mucosal surfaces, and IgE mediates allergic reactions.
– Example: Memory B and T cells remain after infection or vaccination, allowing faster and stronger immune responses upon re-exposure.
4. Active and passive protection
Immunity can be acquired through natural infection, vaccination, or temporary antibody transfer.
– Example: maternal antibodies passed through breast milk provide short-term passive defense.
The immune system’s strength lies in its coordination—an instant, non-specific response that buys time for a targeted, adaptive defense that remembers what it has seen.”
Stay informed with Hemostasis Today.
-
Oct 9, 2026, 12:48Santiago Cepeda Chafla: CereBleed Simplifies Brain Hemorrhage Assessment
-
Oct 9, 2026, 12:34Abdul Muqtadir Abbasi: Pancytopenia Is a Finding, Not a Diagnosis
-
Oct 9, 2026, 12:24Mercy Lung’aho: When Diet Quality and Nutritional Biomarkers Tell Different Stories
-
Oct 9, 2026, 12:22Eugene Fan: Bridging Therapeutic Breakthroughs and Equitable Thalassaemia Care
-
Oct 9, 2026, 12:14Brittany Busse: A New Focus on Iron Deficiency Before Anemia
-
Oct 9, 2026, 12:13Akshat Jain: A New Textbook Bringing Global Perspectives on Sickle Cell Disease
-
Oct 9, 2026, 12:03Heather Case: Bridging Awareness and Action in Women’s Hemophilia Care
-
Oct 9, 2026, 11:58Brandon Luu: Can Iron Deficiency Cause Fatigue Without Anemia?
-
Oct 9, 2026, 11:51Sumaiya Dickens: Marginal Zone B Cells in Transfusion Medicine and Hemophilia A Research