Type A influenza
viruses are further typed into subtypes according to different kinds and combinations of virus surface proteins.
The newly approved quadrivalent vaccine contains two strains of type A influenza
(A/H1N1 and A/H3N2) and two type B strains, a Yamagata lineage strain and a Victoria lineage strain.
The company is building on the previously successful animal model study where mice infected with H1N1 type A influenza
virus were given two doses of the L-A nRNA product and all survived while control and placebo dosed mice all died within six days.
Such candidates would be vaccines that enable the identification of field-exposed flocks through the detection of antibodies to an antigen that is common to all type A influenza
viruses such as NP, M, or NS1.
A 17-year-old boy from West Los Angeles was diagnosed with a case of highly contagious type A influenza
on Christmas Eve, the chief of the county's acute communicable disease control unit said Monday.
In comparison to type A influenza
viruses, type B viruses have been isolated later in the season and less frequently worldwide.
CSA-13 has also undergone in vitro testing at a major university in the United States where it showed the ability to prevent influenza infection by H3N2, one of the common strains of Type A influenza
Impact of epidemic type A influenza
in a defined adult population.
When compared with type A influenza
, type B viruses have been isolated less frequently worldwide; influenza type B isolates were first reported in association with sporadic activity in China, Hong Kong, and Thailand during October and November.
SAN DIEGO -- Quidel Corporation (Nasdaq:QDEL), a leading provider of rapid point-of-care (POC) diagnostic tests, reported today that a clinical study to further validate the performance of its 10-minute diagnostic test for influenza, the QuickVue(R) Influenza A+B test, showed 96% sensitivity (true positive identification) and 97% specificity (true negative identification) in detecting Type A influenza
Development of a real-time reverse transcriptase PCR assay for type A influenza
virus and the avian H5 and H7 hemagglutinin subtypes.
All type A influenza
viruses, including those that regularly cause seasonal epidemics of influenza in humans, are well adapted to elude host defenses.