Idiom
My car broke down on way to the railway station.

failed to work
met with an accident
stopped
ran out of petrol

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Idiom
Select the correct statement about active and passive immunity.

A vaccination is an example of the introduction of passive immunity into the body
Active and passive humoral immunity are both mechanisms of adaptive immunity that useantibodies
Immunological memory is established by passive immunization
The antibodies utilized in active immunity are acquired from another organism

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