Name two sexually transmitted diseases caused by viruses.

Explanation

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for two sexually transmitted diseases (STDs) that are caused by viruses.

2. **Identify Common Viral STDs**:
- One of the most well-known viral STDs is **HIV/AIDS**. HIV (Human Immunodeficiency Virus) can lead to AIDS (Acquired Immunodeficiency Syndrome).
- Another common viral STD is **Hepatitis B**. This virus affects the liver and can be transmitted through sexual contact.

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