Final answer:
Materials that cause infections or slowly damage the body over time can be categorized as hazardous to health.
Step-by-step explanation:
Materials that cause infections or slowly damage the body over time can be categorized as hazardous to health. These hazards can include exposure to various pathogens and toxic substances that can lead to illnesses and diseases. For example, exposure to certain bacteria can cause infections, while long-term exposure to environmental pollutants like heavy metals can slowly damage the body. Therefore, the correct answer is Health.