What are common pathogens that can live in or on humans?

Bacteria and fungi are indeed common pathogens that can live in or on humans. Bacteria can be found on the skin, in the gut, and other areas of the body, where some are beneficial and others can cause infections. Fungi, including yeast, can also be part of the normal human microbiome but can lead to infections, especially in immunocompromised individuals. Understanding the roles of these pathogens is crucial for health and safety practices, as they can impact both individual and public health.

The other options include entities or substances that do not classify as common human pathogens. Viruses are pathogens but are not classified alongside dust, which doesn't fit in the realm of living pathogens. Mold and spores can be allergens and might cause respiratory issues, but they are not typically resident on the human body in the same manner as bacteria and fungi. Lastly, proteins and minerals are essential nutrients but are not pathogens. Hence, the recognition of bacteria and fungi as living pathogens highlights the importance of hygiene and health care practices in preventing infections.