Work practice controls focus on the _____.

Work practice controls are essential components of an overall strategy to reduce the risk of exposure to bloodborne pathogens in the workplace. They primarily involve the actions that workers should take to minimize their potential exposure to pathogens, such as following specific procedures when handling contaminated materials or implementing safe sharps disposal practices. By focusing on behaviors and practices, these controls play a vital role in preventing incidents that could lead to infection, safeguarding employees in occupations with a risk of contact with blood or other potentially infectious materials.

While other aspects like the use of cleaning supplies, the design of equipment, and the development of new vaccines are relevant to overall health and safety in the workplace, they do not specifically address the immediate actions that personnel can take to directly minimize their exposure to bloodborne pathogens. Therefore, the focus on actions taken to minimize exposure makes this option the correct answer.