Public Health Measures in an Influenza Pandemic - the importance of surveillance.
Nicoll A, Influenza Project Team, Ciancio B, de la Hoz KF, Kreidl P, Needham H, Varela C, Vasconcelos P, Webber JT, Wurz A. Euro Surveill. 2007 Nov 1; 12(11):E071101.4. Epub 2007 Nov 1.