<span>Pathogen is the term for bacteria and virus's are not helpful. They are harmful to other living system and cause disease. All bacteria are not pathogens but all bacterial pathogens are harmful and disease causing. Therefore the correct response is true.</span>
The term pathogen means this. Etymologically, pathos means disease, and gen means cause. So a pathogen means something that causes disease. The nature of the pathogen has nothing to do with the name, but it is usually referred to biological agents like bacteria and parasites.
