According
to
the
literature
,
the
history
of
____________________
can
be
traced
back
to
as
early
as
the
7th
century
when
the
____________________
in
India
tried
to
____________________
themselves
by
drinking
snake
____________________
.
The
first
vaccination
was
____________________
with
human
____________________
,
a
practice
widely
____________________
out
in
ancient
India
,
Arabia
,
and
China
.
This
____________________
of
vaccination
____________________
of
collecting
____________________
from
a
patient
suffering
from
mild
form
of
smallpox
virus
infection
and
____________________
the
sample
to
a
healthy
human
,
which
later
led
to
a
minor
infection
.
This
method
was
first
introduced
in
England
by
a
Greek
named
E
.
Timoni
.
However
,
this
method
had
a
risk
of
spreading
smallpox
in
the
community
and
even
worsening
the
health
____________________
of
the
person
who
received
the
inoculation
.
While
the
use
of
human
smallpox
vaccine
was
____________________
.
E
.
Fenner
came
up
with
____________________
smallpox
vaccine
in
1796
:
this
new
method
also
faced
controversy
,
but
continued
to
be
____________________
.
Smallpox
became
a
preventable
disease
by
injecting
pus
extracted
from
a
human
infected
with
cowpox
virus
.
Jenner
named
the
substance
?
vaccine
?
after
the
Latin
word
?
vacca
?
____________________
means
?
cow
,
?
and
____________________
the
process
of
giving
____________________
became
?
vaccination
?
.
