Answer the question according to instructions.
Diphtheria: Pathogen name, mode of transmission, incubation period.

Explanation

### Step-by-Step Solution:

1. **Identify the Pathogen Name**:
- Diphtheria is caused by a bacterium known as *Corynebacterium diphtheriae*. This bacterium is characterized as gram-positive and anaerobic.

2. **Determine the Mode of Transmission**:
- Diphtheria is transmitted through direct contact from person to person. The primary modes of transmission include:
- Respiratory droplets released when an infected person coughs or sneezes.
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