Preparing for pandemic influenza: the need for enhanced surveillance.
Gensheimer
K F
KF
Maine Bureau of Health, Augusta, Maine, USA.
Fukuda
K
K
Brammer
L
L
Cox
N
N
Patriarca
P A
PA
Strikas
R A
RA
D006801:Humans; D007251:Influenza, Human / Q000517:prevention & control*; D011634:Public Health