Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Conclude whether this article is factual or opinion.

### Input:
The article is titled "The Benefits of Vaccines" and it is written by an expert in the field of public health.

### Response:
This article is factual because it is written by an expert in the field of public health and it discusses the benefits of vaccines.