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s
e
lf
-
i
mm
u
ni
t
y
i
n
pe
o
pl
e
w
h
o
a
r
e
e
x
po
s
e
d
to
C
OV
I
D
-
19
,
s
uc
h
a
s
c
o
n
s
u
m
pt
i
o
n
o
f
b
a
l
a
n
c
e
d
n
ut
r
i
t
i
o
n
,
p
hy
s
i
c
a
l
a
c
t
i
vi
t
y
/
m
il
d
e
x
e
r
c
i
s
e
,
a
de
qua
t
e
r
e
s
t,
vi
t
a
m
i
n
s
upp
l
e
m
e
n
t
s
,
n
o
t
s
m
o
ki
ng,
a
n
d
c
o
n
t
r
o
l
l
i
ng
c
o
m
o
r
bi
d
i
t
i
e
s
(
e
g
d
i
a
b
e
t
e
s
m
e
ll
i
t
u
s
,
hype
r
t
e
n
s
i
o
n
,
c
a
n
c
e
r
)
[
8
]
.
P
e
o
pl
e
s
h
o
ul
d
a
l
s
o
pa
y
a
t
ten
t
i
o
n
to
b
a
s
i
c
h
e
a
l
t
h
h
a
bi
t
s
l
i
k
e
b
a
l
a
n
c
e
d
d
i
e
t
s
,
wo
r
ki
n
g
o
ut,
a
n
d
h
a
vi
ng
e
n
o
ugh
s
l
e
e
p
b
e
c
a
us
e
i
t
i
nc
r
e
a
s
e
s
t
h
e
b
o
d
y
’
s
im
m
u
ni
t
y
[
9
]
.
An
o
t
h
er
wa
y
t
o
a
c
qui
r
e
a
c
t
i
v
e
im
m
u
ni
t
y
i
s
by
v
a
c
c
i
na
t
i
o
n
.
Va
c
c
i
ne
s
h
e
l
p
de
v
e
l
o
p
im
m
u
ni
t
y
by
im
i
t
a
t
i
n
g
a
n
i
n
f
e
c
t
i
o
n
.
Va
c
c
i
ne
s
i
n
t
e
r
a
c
t
w
i
t
h
th
e
im
m
u
n
e
s
y
s
t
e
m
a
n
d
o
f
t
e
n
pr
o
duc
e
a
n
i
mm
u
n
e
r
e
s
po
n
s
e
s
i
mi
l
a
r
t
o
t
h
a
t
pr
o
duc
e
d
by
t
h
e
n
a
t
ur
a
l
i
n
f
e
c
t
i
o
n
.
M
a
ny
v
a
c
c
i
ne
s
a
l
s
o
pr
o
duc
e
i
mm
u
n
o
l
o
gi
c
m
e
m
o
r
y
s
im
i
l
a
r
to
t
h
a
t
a
c
qui
r
e
d
by
h
a
vi
ng
n
a
t
ur
a
l
d
i
s
e
a
s
e
.
Onc
e
t
h
e
i
mi
t
a
t
i
o
n
i
nf
e
c
t
i
o
n
go
e
s
a
wa
y
,
t
h
e
b
o
d
y
i
s
l
e
f
t
wi
t
h
a
s
upp
l
y
o
f
“
m
e
m
o
r
y
”
T
-
l
ym
p
h
o
c
y
t
e
s
,
a
s
we
ll
a
s
B
-
l
y
m
p
h
o
c
y
t
e
s
t
h
a
t
w
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ll
r
e
m
e
m
be
r
h
o
w
to
f
i
g
h
t
t
h
a
t
di
s
e
a
s
e
i
n
t
h
e
f
ut
ur
e
.
T
h
e
m
o
r
e
s
i
mi
l
a
r
a
v
a
c
c
i
ne
i
s
t
o
t
h
e
d
i
s
e
a
s
e
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c
a
u
s
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n
g
f
o
r
m
o
f
t
h
e
o
r
ga
ni
s
m
,
t
h
e
be
tt
e
r
t
h
e
im
m
u
n
e
r
e
s
po
n
s
e
t
o
t
h
e
v
a
c
c
i
ne
[
7
]
.
T
h
e
im
m
u
n
e
r
e
s
po
n
s
e
p
l
a
y
s
a
n
im
po
r
t
a
n
t
r
o
l
e
i
n
pr
o
t
e
c
t
i
n
g
a
ga
i
ns
t
i
nf
e
c
t
i
o
us
a
ge
n
t
s
.
I
t
i
s
a
we
ll
-
k
n
o
wn
f
a
c
t
t
h
a
t
f
o
r
a
l
m
o
s
t
a
l
l
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n
f
e
c
t
i
o
us
d
i
s
e
a
s
e
s
,
t
h
e
n
u
m
be
r
o
f
pe
o
p
l
e
e
x
po
s
e
d
to
i
nf
e
c
t
i
o
n
s
i
s
m
uc
h
hi
g
h
e
r
t
h
a
n
t
h
o
s
e
wh
o
s
u
f
f
e
r
f
r
o
m
t
h
e
di
s
e
a
s
e
.
T
hi
s
s
h
o
ws
t
h
a
t
m
o
s
t
pe
o
pl
e
c
a
n
de
s
t
r
oy
t
h
e
s
e
mi
c
r
o
or
ga
ni
s
m
s
a
n
d
t
h
u
s
pr
e
ve
n
t
t
h
e
de
v
e
l
o
p
m
e
n
t
o
f
i
nf
e
c
t
i
o
ns
.
P
r
o
vi
d
i
ng
t
hi
s
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n
f
o
r
m
a
t
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o
n
t
o
t
h
e
ge
ne
r
a
l
po
pul
a
t
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o
n
w
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ll
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nc
r
e
a
s
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pu
bli
c
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wa
r
e
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e
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s
to
wa
r
ds
im
pr
o
vi
n
g
t
h
e
i
r
im
m
u
n
e
s
y
s
t
e
m
[
10
]
.
R
i
s
k
c
o
m
m
un
i
c
a
t
i
on
i
s
us
e
d
t
o
s
e
e
th
e
di
s
s
e
m
i
n
a
ti
on
of
i
n
f
or
m
a
t
i
on
to
th
e
p
ub
l
i
c
r
e
g
a
r
di
n
g
h
e
a
l
t
h
,
r
i
s
k
s
,
a
n
d
e
v
e
n
ts
,
s
u
c
h
a
s
di
s
e
a
s
e
ou
tb
r
e
a
k
s
a
n
d
i
n
s
tr
u
c
ti
on
s
on
h
ow
t
o
c
h
a
n
g
e
b
e
h
a
v
i
or
t
o
r
e
d
u
c
e
th
e
i
m
pa
c
t
[
11
]
.
E
f
f
e
c
t
i
v
e
r
i
s
k
c
o
m
m
u
ni
c
a
t
i
o
n
i
s
e
s
s
e
n
t
i
a
l
f
o
r
i
mpr
o
vi
n
g
pu
bl
i
c
u
n
de
r
s
t
a
n
d
i
ng
o
f
po
t
e
n
t
i
a
l
o
r
a
c
t
u
a
l
h
e
a
l
t
h
t
h
r
e
a
t
s
a
n
d
h
e
l
ps
t
h
e
pu
bli
c
t
o
m
a
k
e
i
nf
o
r
m
e
d
d
e
c
i
s
i
o
n
s
a
b
o
ut
r
i
s
k
mi
t
i
ga
t
i
o
n
m
e
a
s
ur
e
s
[
12
]
.
T
h
e
r
e
f
o
r
e
,
dur
i
n
g
a
n
e
w
pa
n
d
e
m
i
c
,
ge
tt
i
n
g
i
nf
o
r
m
a
t
i
o
n
f
r
o
m
v
a
r
i
o
us
s
o
ur
c
e
s
,
s
uc
h
a
s
pu
bli
c
he
a
l
t
h
pr
o
f
e
s
s
i
o
n
a
l
s
,
t
h
e
go
v
e
r
nm
e
n
t
,
a
n
d
t
he
m
e
d
ia,
c
a
n
i
nc
r
e
a
s
e
pe
o
p
l
e
’
s
a
wa
r
e
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s
a
b
o
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th
e
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s
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a
n
d
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o
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s
e
que
n
t
l
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h
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pr
e
v
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t
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v
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m
e
a
s
ur
e
s
[
13
]
.
T
h
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t
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n
e
t
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r
e
a
s
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he
a
l
t
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c
a
r
e
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nf
o
r
m
a
t
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n
.
Goo
gl
e
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r
e
n
d
s
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s
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n
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ne
t
r
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n
e
t
s
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a
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c
h
v
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k
[
2,
14
]
.
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r
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tt
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goo
gl
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m
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an
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].
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].
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]
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].
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[9
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S.
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0
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l
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.
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1
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v
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l
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2
]
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ri
s
P.
L.
A
.,
J
u
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.
,
“
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s
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W
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.
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v
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l
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p
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.
[1
3
]
Mo
h
s
en
K
h
o
s
rav
i
,
“
Pe
r
ce
i
v
e
d
R
i
s
k
o
f
CO
V
ID
-
19
Pan
d
emi
c
:
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h
e
Ro
l
e
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u
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c
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rr
y
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n
d
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ru
s
t
,
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l
ect
r
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n
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c
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l
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.
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7
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