Common cold differs from pneumonia in, that

Options

A. Pneumonia can be prevented by a live attenuated bacterial whereas the common cold has no effective vaccine.
B. Pneumonia is caused by a virus while the common cold is caused by the bacterium Haemophilusinfluenzae
C. Pneumonia pathogen infects alveoli whereas the common cold affects nose and respiratory passage but not the lungs
D. Pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease

Answer

To answer the question "Common cold differs from pneumonia in that," we will analyze the differences between the two conditions step by step.

### Step-by-Step Solution:

1. **Define Common Cold and Pneumonia:**
- The common cold is primarily a viral infection that affects the upper respiratory tract, including the nose, throat, sinuses, and larynx.
- Pneumonia, on the other hand, is an inflammatory condition of the lungs that primarily affects the alveoli, which are the small air sacs in the lungs.

2. **Symptoms Comparison:**
- Common cold symptoms typically include a runny or stuffy nose, sore throat, cough, sneezing, and sometimes a mild fever.
- Pneumonia symptoms include a productive or dry cough, chest pain, fever, and difficulty breathing.

3. **Pathogen Involvement:**
- The common cold is usually caused by viruses (such as rhinoviruses), while pneumonia can be caused by bacteria, viruses, or fungi. However, it is important to note that pneumonia is not caused by the same pathogens as the common cold.

4. **Location of Infection:**
- In pneumonia, the infection occurs in the alveoli of the lungs, leading to inflammation and fluid accumulation.
- In contrast, the common cold affects the upper respiratory tract and does not involve the lungs or alveoli.

5. **Vaccine Availability:**
- There are vaccines available for certain types of pneumonia (like the pneumococcal vaccine), whereas there is no effective vaccine for the common cold due to the variety of viruses that can cause it.

6. **Communicability:**
- Both pneumonia and the common cold are communicable diseases, but pneumonia can also be associated with more severe complications, especially in vulnerable populations.

7. **Conclusion:**
- Based on the above comparisons, the most accurate statement is that pneumonia pathogens infect the alveoli, while the common cold affects the nose and respiratory passages but does not involve the lungs.

### Final Answer:
The correct answer is **Option C**: Pneumonia pathogens infect alveoli, whereas the common cold affects the nose and respiratory passage but not the lungs.