What are antibiotics? What precautions must be taken while taking antibiotics?

Explanation

### Step-by-Step Solution:

1. **Definition of Antibiotics**:
- Antibiotics are chemicals produced by certain microbes (like bacteria and fungi) that can kill or inhibit the growth of disease-causing microorganisms. They are primarily used to treat infections caused by bacteria.

2. **Sources of Antibiotics**:
- Common antibiotics are derived from bacteria and fungi. Examples include streptomycin, tetracycline, and penicillin.

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