Precision Medicine Drug Development: What it is & How it Works

Rare Disease Research, Treatment, Advances

Pfizer: One of the world's premier biopharmaceutical companies

Safety Data Sheets | Pfizer

Clinical Trials for Children | Pfizer

Compassionate Use Programs: Expanded Access to Investigational Drugs

Our Science: Pharmaceutical Development | Pfizer | Pfizer

Understanding Gene Therapy: Research, Treatments, and Manufacturing

Our Products: Holding the Promise of a Breakthrough | Pfizer

Reporting Adverse Drug Events | Pfizer

Lists (e.g., `<ul>` or `<ol>`) should only contain list items (`<li>`) as a direct descendant 
to ensure that screen readers can accurately report the amount of items contained in the list. 

## Example

In the following example, some screen readers would say this list has two items, instead of 
four: 

```html
<ul>
    <div class="some_class">
        <li>Example 1</li>
    </div>
    <div class="some_other_class">
        <li>Example 2</li>
        <li>Example 3</li>
        <li>Example 4</li>
    </div>
</ul>
```

To fix this, you would need to remove the `<div class="some_class">` and 
`<div class="some_other_class>` elements and ensure only `<li>` list items remain.

## Further reading

The [formal specification for the list element](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/ul)
shows what is and is not permitted inside an `<ul>` and `<ol>`.

See [Technique H88](https://www.w3.org/TR/WCAG20-TECHS/H88.html) for more information.

list-not-following-semantics

February 2025

January 2025

Pfizer

Title / URL	Issues
Precision Medicine Drug Development: What it is & How it Workswww.pfizer.com/science/innovation/precision-medicine	5
Rare Disease Research, Treatment, Advanceswww.pfizer.com/science/focus-areas/rare-disease	5
Pfizer: One of the world's premier biopharmaceutical companieswww.pfizer.com/	5
Safety Data Sheets \| Pfizerwww.pfizer.com/products/medicine-safety/product-safety	5
Clinical Trials for Children \| Pfizerwww.pfizer.com/science/clinical-trials/children	5
Compassionate Use Programs: Expanded Access to Investigational Drugswww.pfizer.com/science/clinical-trials/expanded-access	5
Our Science: Pharmaceutical Development \| Pfizer \| Pfizerwww.pfizer.com/science	5
Understanding Gene Therapy: Research, Treatments, and Manufacturingwww.pfizer.com/science/innovation/gene-therapy	5
Our Products: Holding the Promise of a Breakthrough \| Pfizerwww.pfizer.com/products	5
Reporting Adverse Drug Events \| Pfizerwww.pfizer.com/products/medicine-safety/reporting	5

Ensure lists are marked up correctly

Pfizer

Where this issue has occurred