On-line Dictionary
Vaccine
Vaccine
a.
Of or
pertaining
to
cows
;
pertaining
to,
derived
from
, or
caused
by,
vaccinia
; as,
vaccine
virus
;
the
vaccine
disease
.
Vaccine
n.
The
virus
of
vaccinia
used
in
vaccination
.
Vaccine
n.
any
preparation
used
to
render
an
organism
immune
to
some
disease
, by
inducing
or
increasing
the
natural
immunity
mechanisms
.
Prior
to
1995
,
such
preparations
usually
contained
killed
organisms
of
the
type
for
which
immunity
was
desired
,
and
sometimes
used
live
organisms
having
attenuated
virulence
.
since
that
date
,
preparations
containing
only
specific
antigenic
portions
of
the
pathogenic
organism
are
also
used
,
some
of
which
are
prepared
by
genetic
engineering
techniques
.
URL of this page:
http://www.kvadrata.net/vaccine
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