An outbreak of severe pneumococcal pneumonia among children occurred in Iowa from November 1995 through January 1996. An associated outbreak of influenza disease was predominantly caused by influenza A (H1N1) for the first time since 1989. We conducted a case-control study to determine whether preceding influenza infection was directly associated with pneumococcal illness. We identified 13 chil...

We assessed the self-reported prevalence of influenza-like illness (ILI) during pregnancy in two samples of 546 and 2764 new mothers who were pregnant during the 2009-10 and 2010-11 peak influenza seasons. During pregnancy, 11% of participants experienced an ILI. Cough, sore throat and nasal congestion were the most common reported symptoms. Only 4.6% and 9% of the participants in sample 1 and ...

During influenza season, acute respiratory illness due to influenza is difficult to distinguish from other influenza-like illnesses, but testing should be reserved for situations when timely results will influence management or infection control measures. Immunization status and timing of disease onset notwithstanding, a neuraminidase inhibitor should be offered immediately for certain high-ris...

A case crossover study with the New York State Department of Health from January 1, 2006 to December 31, 2014, a validation sample International Classification Diseases, ninth revision, codes for cervical artery dissection drawn 599 patients aged 18 45 years confirmed strokes at Columbia University Medical Center 2008 March 15, 2015. Of 3610 nontraumatic (mean age, 52 years), 265 (7%) had one o...

BACKGROUND In April 2009, an outbreak of novel swine-origin influenza A (2009 H1N1 influenza) occurred at a high school in Queens, New York. We describe the outbreak and characterize the clinical and epidemiologic aspects of this novel virus. METHODS The New York City Department of Health and Mental Hygiene characterized the outbreak through laboratory confirmation of the presence of the 2009...

ASPREN1⁄4Australian Sentinel Practices Research Network; ILI1⁄4 influenza-like illness; SPNWA1⁄4Sentinel Practitioners Network of Western Australia; VicSPIN1⁄4Victorian Sentinel Practice Influenza Network. * For ASPREN and VicSPIN: overall proportions of positive swabs collected during the influenza season (MayeOctober). u MAustralia depicted a severe influenza season, focusing on the record nu...

The study investigated the overall effectiveness and its determinants of an influenza vaccination in the reduction of acute respiratory illness (ARI) clinic visits and sickness absence for a working population. We collected and compared the data of clinic visits and hours of sick leave among vaccinated and non-vaccinated workers during January and April in 1998 and 1999. A multiple regression a...