Figure 1
Evidence of West-East spread of influenza in Europe during the 2003–2004 season: the longitude of 23 countries correlated against the peak week of influenza activity per country.
Figure 1 | BMC Infectious Diseases
Evidence of West-East spread of influenza in Europe during the 2003–2004 season: the longitude of 23 countries correlated against the peak week of influenza activity per country.