Which products are included in GHTF's guidance on labeling?

The correct choice encompasses both medical devices and in vitro diagnostic (IVD) devices, which are covered under the Global Harmonization Task Force (GHTF) guidelines on labeling. This guidance aims to harmonize the labeling requirements for these types of devices globally, ensuring that essential information is conveyed to users, patients, and healthcare professionals.

Labeling is critical because it provides users with the necessary information regarding the proper use, safety, and efficacy of medical devices and IVDs. By including both categories, the GHTF recognizes the importance of consistent and clear communication across the healthcare spectrum, facilitating better understanding and compliance with regulatory requirements.

The other options do not encompass the full scope of what the GHTF guidance covers, as they focus either solely on medical devices or IVD devices, which does not reflect the comprehensive nature of the guidelines that apply to both categories. Thus, the selection of medical and IVD devices accurately reflects the intent of the GHTF's efforts in standardizing labeling practices globally.