Can the flu cause serious health issues?
Influenza has the potential to make a bad situation worse. In some situations, an annual flu vaccine can help to avoid a host of more dangerous health issues.
cold flu
Browse videos by topic categories
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
ALL