How does vaccination protect a person from a disease?

Explanation

### Step-by-Step Solution:

1. **Understanding Vaccination**:
- A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. It typically contains a harmless part of the microorganism (like proteins or toxins) or a weakened or killed form of the pathogen.

2. **Components of Vaccines**:
- Vaccines can contain:
- **Killed or weakened microorganisms**: These are pathogens that have been inactivated or attenuated so that they cannot cause disease.
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