Samples
Primary respiratory samples were
collected between October week 40/2019 and March week 14/2020 in the
context of the Arbeitsgemeinschaft Influenza (AGI) virological sentinel,
including nasal or throat swabs from a total of 5080 patients presenting
with acute respiratory illness. Of these, 413 were A(H1N1)pdm09
positive. In addition, 471 influenza positive samples (isolates) were
provided by diagnostic laboratories distributed all over Germany. Of
these, 218 were A(H1N1)pdm09 positive (Supplemental Table 1).