Outpatient visits have surged to their highest levels since the peak of the 2009 swine flu pandemic, with influenza-related emergency department visits remaining very high across the U.S. Notably, flu ...

Evidence suggests that the global swine flu pandemic of 2009 began in central Mexico, according to research supported by the National Institute of Allergy and Infectious Diseases of the National ...

Influenza infection is self-limiting in humans, but the virus is notorious for causing substantial mortality and morbidity worldwide. Clinical features of influenza virus infection in humans encompass ...

Complications related to the upper airways, including sinusitis or otitis; Pulmonary complications, including bronchitis, asthma (sometimes with status asthmaticus), and acute exacerbations of chronic ...

A new study has identified an influenza virus circulating in pigs that shows multiple traits associated with pandemic potential. Known as H1N2, the virus belongs to a lineage of flu viruses that ...