toqus
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vaccine
noun
a
substance
,
usually
injected
,
that
helps
the
body
build
protection
against
a
particular
disease
•
The
nurse
gave
the
baby
a
vaccine
to
protect
her
from
measles
.
The
nurse
gave
the
baby
a
vaccine
to
protect
her
from
measles
.
•
Many
travelers
get
a
yellow-fever
vaccine
before
flying
to
tropical
countries
.
Many
travelers
get
a
yellow-fever
vaccine
before
flying
to
tropical
countries
.
Early
19th-century
,
from
Latin
vaccinus
‘
of
or
from
cows
’,
because
the
first
vaccine
used
cowpox
to
protect
against
smallpox
.
noun
something
such
as
an
action
,
idea
,
or
policy
that
protects
people
from
a
problem
or
harmful
influence
•
Education
is
the
best
vaccine
against
ignorance
.
Education
is
the
best
vaccine
against
ignorance
.
•
Strong
cybersecurity
acts
like
a
vaccine
for
your
computer
,
blocking
harmful
attacks
.
Strong
cybersecurity
acts
like
a
vaccine
for
your
computer
,
blocking
harmful
attacks
.
Extension
of
the
medical
sense
to
abstract
ideas
,
first
recorded
in
the
mid-20th
century
.
