Name a vaccine prepared through genetic engineering.

Explanation

### Step-by-Step Solution:

1. **Understanding Genetic Engineering**: Genetic engineering involves manipulating the genetic material (DNA or RNA) of an organism to create desired traits or products. In the context of vaccines, this means using the genetic material of a pathogen to stimulate an immune response without causing disease.

2. **Types of Vaccines**: Vaccines can be classified into different generations. The first generation includes traditional vaccines made from weakened or inactivated pathogens. The second generation, however, is made using genetic engineering techniques.

3. **Second Generation Vaccines**: These vaccines are developed using DNA technology. They often involve inserting genes from a pathogen into a harmless organism or using recombinant DNA technology to produce antigens that can trigger an immune response.

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