Question

What do having the measles and being vaccinated against the measles have in common?

Answer 1

They are both forms of active immunity.

What is active immunity?

When our own immune system defends us against a pathogen, this is known as active immunity. Our immune system develops active immunity when exposed to a potential disease-causing substance (i.e., pathogen). Active immunity is crucial since it not only "fights off" these pathogens but also lasts a very long period in the form of immunologic memory.

B and T lymphocytes with the ability to recognize a particular pathogen make up immunologic memory. These cells circulate at low levels in human bodies, but if they become "activated" by encountering the pathogen while traveling, they rapidly begin to multiply and send signals to other immune system components to do the same. There are two reasons memory cells are important. They first help our immune systems react swiftly. The immune response is prepared the moment the infection is contacted since they are secondly pathogen-specific.

I understand the question you are looking for is this:

What do "having the measles" and being vaccinated against the measles have in common?

1. They are both forms of active immunity.
2. They are both forms of neutral immunity.
3. They are both forms of passive immunity.
4. They are both forms of infection.
5. They are both forms of immune deficiency.

Learn more about active immunity here:

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