Pathogen
What is it?
A pathogen is a disease-causing bacteria.
How is a pathogen caught?
A pathogen can enter the human body by any openings e.g wounds, nose. Some pathogens, as you may know, are more contagious than the other. Pathogens can be dangerous, and if one enters your body, it can be bad news. Do not worry too much about that, though, unless it is a very contagious disease currently going around.
Hope this helped you understand! If you have questions, let me know.