Answer: Attenuated
Explanation:
An attenuated pathogen is a pathogen which remains in a weakened, less virulent (infection causing) state. It can cause minor disease. The organisms such as bacteria, fungi, viruses and parasites can be the example of attenuated pathogen.
The attenuated pathogen is used in vaccines. It is capable of activating the immune response in the host organism against the already present disease causing pathogen.
