Each year, seasonal flu sickens about 1 billion people worldwide and causes approximately 290,000 to 650,000 respiratory ...

Periodically, the yearly flu transforms ... from other species. Only influenza A viruses infect nonhuman hosts, and a reassortment of genes can occur between those subtypes that typically infect ...

(NEXSTAR) – The flu is spreading far and wide ... about 97% have turned up positive for influenza A. Influenza A is further ...

Within this total, virus subtypes were analyzed in 100 cases and it was identified that 99% corresponded to the subtype Influenza A H3N2 and 1% to the subtype “Influenza A H1N1″ (which was the ...

Thus, a type A virus isolated in 1995 in Memphis Tennessee with a strain number of 123 and an H5N1 subtype is designated: Influenza virus was first isolated 80 years ago in 1933. The first ...

There are 16 different hemagglutinins and nine different neuraminidases, and reassortment of these two antigens determines the influenza A virus subtype (e.g., H1N1 or H3N2). Embedded within the ...

Avian influenza (AI) was diagnosed in May 2002 for the first time in Chile and South America. The epidemic was caused by the highly pathogenic AI (HPAI) virus subtype H7N3 that emerged from a low ...

A stark example of this came in 2009, with the emergence of the H1N1 'swine flu' subtype that killed an estimated 151,700 to 575,400 people worldwide. A protein on the surface of influenza ...

In accordance with the International Health Regulations (2005), any human infection caused by a new influenza A virus subtype is considered a potentially significant public health event and is ...