Download You will need

You will need:
6 red counters (body cells)
2 green counters (B cells)
3 blue counters (killer T cells)
2 white counters (viruses)
2 yellow counters (bacteria)
A whiteboard marker
Object of game:
Pathogens try to kill the body cells. Immune cells try to protect the body cells
by counterattacking the pathogens. To kill a cell, a pathogen moves into the
body cell’s square. If the pathogen is a virus, it turns the body cell into a virus
by writing a V on it. If the pathogen is a bacterium, the body cell just leaves
the board. The game ends when there is either no body cells or no pathogenic
cells left on the board.
Rules of movement:
BODY CELLS: stay put for whole game unless turned into a virus
VIRUSES AND BACTERIA: may move one space any direction EXCEPT
diagonal. Bacteria simply kill a cell by moving onto their spot, and the body
cell leaves the board. Viruses change body cells into more viral cells, but
doesn’t take its spot.
B CELLS: May move 2 spaces, but not diagonal. They may only TAG
antigens, but not capture them. Can tag any pathogen on a space adjacent to
them, but not diagonal to them
KILLER T CELLS: may move only one space, in any direction, including
diagonally. Capture antigens that have ALREADY BEEN TAGGED only. They
move onto the pathogen’s space, and the pathogen leaves the board.
How to play:
One person is the pathogens, the other controls the immune cells.
All the pathogens move their space, THEN all the immune cells move.
Following this, read out a “body event” (in order).
When you’ve finished playing, answer the following questions:
1. How was this a good demonstration of the work of the immune cells?
How was it poor?
2. Do pathogens really all “move at once” (ie. Do they coordinate their
activities?)
3. How would you improve this game to make it a better demonstration of
the immune system?
Body Events
1) Today I went on a 5-mile run, even though I was not feeling well. This used
up a lot of my energy so now I have less energy for fighting pathogens. My
immune system feels weak and the pathogens have an advantage. Both viruses
and bacteria may move 2 spaces on this turn instead of just one.
2) I am now running a fever. This stimulates my immune system into action. On
this turn, the T cells may also move 2 spaces, just like the B cells.
3) I just received a shot of interferon, a medicine that interferes with the ability of
viruses to attack cells. Viruses may not move on this turn, only bacteria.
4) The doctor prescribed an antibiotic to help fight off a bacterial infection.
Bacteria may not move on this turn, only viruses.
5) I decided to stop taking my antibiotics even though the doctor said to finish
the whole bottle. Any bacteria who are out of the game may re-enter on any
available square only the edges.
6) I went to visit a sick friend and was exposed to more pathogens. Two viruses
who got captured may re-enter the game at any available edge space.
7) When I got sick this time, I really took good take of myself. I drank plenty of
fluids and got lots of rest. This helped my immune system. Both B cells and T
cells may take an extra step on this next turn.
8) I got another infection, but this time I did what the doctor said and took my
antibiotics for the full ten days. All the bacteria are now out of the game.
9) I just found out that you can catch the same bacteria more than once. The
bacteria may re-enter the game on any available edge space.