Aedes aegypti is a vector for

Options

A. Both dengue and yellow fever
B. Dengue fever
C. Yellow fever
D. Japanese encephalitis

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about the role of Aedes aegypti as a vector. A vector is an organism that transmits pathogens from one host to another.

2. **Identifying Aedes aegypti:**
Aedes aegypti is a species of mosquito, specifically a female mosquito, which is known for its role in transmitting various diseases.

3. **Recognizing the Diseases:**
Aedes aegypti is primarily known for being a vector for several diseases, including:
- Dengue fever
- Yellow fever
- Zika virus
- Chikungunya virus

4. **Mechanism of Transmission:**
The female Aedes aegypti mosquito bites humans to obtain blood, which is necessary for the maturation of her eggs. During this process, if she has previously bitten an infected person, she can transmit the pathogens to the next human she bites.

5. **Conclusion:**
Therefore, Aedes aegypti is a vector for both dengue fever and yellow fever. The correct answer to the question is that Aedes aegypti carries and transmits pathogens responsible for these diseases.

**Final Answer:**
Aedes aegypti is a vector for both dengue fever and yellow fever.

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