Lesson 6 of 16
A vaccine
Show on a big screenHow can a body get ready for a new germ?
Step 1 of 4
- Two doors: "Met the illness" and "Vaccine."
- Door one: the illness happens, then the memory is set.
- Door two: no illness run. The memory is set directly.
- Both doors give the body a memory of the germ.
A vaccine trains the immune system to know a germ. It is made so that it does not cause the illness.
The rule
A vaccine has dead germs, weak germs, or a safe piece. It trains the body before the germ arrives. It helps prevent illness. It does not cure it.
| Door | Illness first? | Memory set? |
|---|---|---|
| Met the germ | Yes | Yes |
| Vaccine | No | Yes |
Doctors and health workers advise which vaccines to get, and when. Vaccines are tested for safety. Ask a doctor or a parent about them.
Pick a door. Then see what the germ does later.
Loading lab…
Try the lab to finish this lesson.