Active immunity is generated by your body. So you get active immunity as a result of infections or due to vaccines. Passive immunity is not generated by your body. Here the antibodies are to be supplied. Child gets the antibodies from mother. Alternately you get the antibodies via injections. The effect of active immunity is long lasting. The effect of passive immunity is short lived. So the active immunity is considered as better. The passive immunity has one advantage. It is available with immediate effect, while it takes about two to three weeks, before the effects of active immunity is available.
active components can have gain, passive can't.
active
Active - Active Active - Passive
The two different types of sonar are passive and active.
passive
Look in book
active and passive
== == "English grammer active and passive voice change from active to passive .
is a thermocouple an active or passive transducer?-why?
Passive is to change as active is to affect.
passive
Active transport requires energy; passive transport does not.