Which of the following statements is incorrect regarding acute diseases?

Options

A. They last for a long time, may be as much as a lifetime.
B. A person suffering from an acute disease always recovers completely after treatment.
C. They do not cause long term bad effects on human health
D. These include diarrhoea, malaria, etc.

Answer

To determine which statement is incorrect regarding acute diseases, we need to analyze each option provided.

1. **Understanding Acute Diseases**: Acute diseases are typically characterized by their sudden onset and relatively short duration. They often resolve within a few days to weeks.

2. **Evaluating the Statements**:
- **Statement 1**: "They last for a long time, maybe as much as a lifetime."
- This statement is incorrect. Acute diseases do not last for a long time; they are short-term illnesses. Chronic diseases, on the other hand, can last for a lifetime.

- **Statement 2**: "A person suffering from acute disease always recovers after treatment."
- This statement is generally true. Most acute diseases are treatable, and patients often recover with appropriate medical care.

- **Statement 3**: "They do not cause long-term back defect on human health."
- This statement is also true. Acute diseases typically do not lead to long-term health issues if treated properly.

- **Statement 4**: "This includes diarrhea, malaria."
- This statement is correct as both diarrhea and malaria are classified as acute diseases.

3. **Conclusion**: The first statement is the incorrect one regarding acute diseases, as it mischaracterizes their duration.

### Final Answer:
The incorrect statement regarding acute diseases is: "They last for a long time, maybe as much as a lifetime."