The type of immunity in which the body systems work together to combat pathogens is an example of natural immunity.
Our immune systems help us fight infections. In our body, we develop specialized proteins called antibodies which attack pathogens in the form of viruses or bacteria.
We get immunity from a particular disease when we have developed an antibody against it. When we get infected, our body's response is to develop an antibody against it. This is called natural immunity.
The first time that infection happens, we get sick but if we get infected the next time, our immune system remembers the pathogen and responds more effectively than before.
Natural immunity can weaken over time and the time it requires to weaken it depends on the disease.
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