Which part of the living system did you change?
Labs / Biology
Immune Response
A Strain A infection is already spreading through the tissue. Watch antibodies (the green Y shapes) tag pathogens so patrolling macrophages can engulf them, while memory cells build up in the background. Then re-inject the same strain, or a brand new one, and compare how the body responds the second time around.
Labs / Biology / Immune Response
Immune Response
A Strain A infection is already spreading through the tissue. Watch antibodies (the green Y shapes) tag pathogens so patrolling macrophages can engulf them, while memory cells build up in the background. Then re-inject the same strain, or a brand new one, and compare how the body responds the second time around.
Why it matters
Why explore this?
Living systems are connected and constantly changing. This model makes one biological process visible so you can test how its parts affect one another.
Explore
Try the model
Load 0 cellsAb 0 uMemory 0 cellsDay 0 d
Investigate
Questions to test
Predict first, try it in the model, then use what you observe to answer.
What to try
- Let the first infection clear, then inject Strain A again. Why is the second pathogen spike so much smaller and shorter?
- After beating Strain A, inject Strain B instead. Does the memory you built against A help at all against a brand-new strain?
- Hit Reset, then Vaccinate against a strain before ever injecting it. What happens to the pathogen load when the real infection finally arrives?
- Push Virulence to the top before your body has any memory. Can the immune system still win, and how close does the pathogen get to taking over?
- Watch the memory line after each battle — why does it keep climbing and never fall back to zero, even long after the pathogen is gone?
Explain
Make sense of what happened
Explain the process as a chain: a change happens, the system responds, and that response affects what happens next. Use an observation from the model as evidence.
Check
Before you leave
How did the system respond?
How would you explain that response?
If you can answer all three using evidence from the model, you understand the main idea. If not, return to Explore and change one setting at a time.