Volume 19, Number 5—May 2013
Research
Changes in Severity of Influenza A(H1N1)pdm09 Infection from Pandemic to First Postpandemic Season, Germany
Figure 1

Figure 1. . Epidemic curve of influenza A(H1N1)pdm09 virus infections. A) Season 2009–10 and B) season 2010–11. Weeks are indicated; black indicates influenza A(H1N1)pdm09 cases found in the study group at University Hospital Heidelberg; gray indicates influenza cases in Germany.
1These authors contributed equally to this article.