Pathogen defined as
Entering our body to infect us
They don't multiply outside the body
Can never harm morphological and functional damage
All of the above
As we have learnt,
How pathogens cause diseases -
Most parasites pathogens as they cause harm to the host by living in (or on) them
- wherein
The pathogens can enter our body by various means, multiply and interfere with normal vital activities, resulting in morphological and functional damage.