Background Since the start of the 2009 influenza A pandemic (H1N1pdm), the World Health
Organization and its member states have gathered information to characterize the clinical …

Background. It is unclear whether pandemic 2009 influenza A (pH1N1) infection caused
more significant disease among hospitalized adults than seasonal influenza. Methods. A …

During the spring of 2009, pandemic influenza A (H1N1) virus (pH1N1) was recognized and
rapidly spread worldwide. To describe the geographic distribution and patient characteristics …

Background. Data on risk factors for severe outcomes from 2009 pandemic influenza A
(H1N1) virus infection are limited outside of developed countries. Methods. We reviewed …

Background: In the context of 2009 pandemic influenza (H1N1) virus infection (pandemic
H1N1 influenza), identifying correlates of the severity of disease is critical to guiding the …

Introduction Pregnant women have been identified as a high risk group for severe illness
with 2009 pandemic influenza A (H1N1) virus infection (pH1N1). Obesity has also been …

Background: During the 2009 influenza pandemic, uncertainty surrounding the seriousness
of human infections with the H1N1pdm09 virus hindered appropriate public health …

Given the potential worsening clinical severity of 2009 pandemic influenza A (H1N1) virus
(pH1N1) infection from spring to fall 2009, we conducted a clinical case series among …

Background 18 500 laboratory-confirmed deaths caused by the 2009 pandemic influenza A
H1N1 were reported worldwide for the period April, 2009, to August, 2010. This number is …

Background: In the face of an influenza pandemic, accurate estimates of epidemiologic
parameters are required to help guide decision-making. We sought to estimate …