what is immunity?

Answer Posted / masood ahmad

1. resistance to disease: a body's ability to resist a
disease. Immunity may exist naturally or as a result of
inoculation or previous infection. In active immunity, the
body itself produces appropriate antibodies and lymphocytes,
while in passive immunity, antibodies are introduced from
another source, as from mother to fetus.
immunity to smallpox

2. freedom from responsibility or punishment: exemption or
protection from something unpleasant, e.g. a duty or
penalty, to which others are subject
immunity from deportation

3. criminal law exemption from prosecution: an exemption
from prosecution for somebody who has knowledge of possible
criminal activity and may be personally culpable, offered in
exchange for giving sufficient information to the police or
to a grand jury

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