Influenza B almost exclusively infects humans and is less common than influenza A. Flu type B also mutates about two to three times more slowly than influenza A. Because humans are the natural host of influenza B, pandemics generally do not occur with influenza B viruses.22 Although scientists...
There are two main types of influenza viruses that affect people:Type A and Type B. Both types are behind the influenza epidemic that hits the United States each year.Millions of people in the U.S. are impacted by the flu annually, with the elderly, infants, and those with chronic diseas...
Researchers divide flu viruses into three general categories: types A, B, and C. All three types can mutate, or change into new strains, and type A influenza mutates often, yielding new strains of the virus every few years. This means that you can never develop a permanent immunity to in...
What’s the difference between Type A and Type B? Influenza A viruses come in many varieties. Four subtypes commonly affect humans. But many more influenza A viruses have been identified in animals, which makes it a potential source of pandemics whenever a new type of influenza A jumps to ...
and energy intensity.The population had relatively little influence on carbon emissions.There are differences among the influence on carbon emission as a result of urban average income increase,the progress of urbanization and energy intensity reduce.The intensity-affected difference constructs the main ...
1. Indications and Usage for Fluzone Quadrivalent Fluzone® Quadrivalent is a vaccine indicated for active immunization for the prevention of disease caused by influenza A subtype viruses and type B viruses contained in the vaccine. Fluzone Quadrivalent is approved for use in persons 6 months of...
Influenza in humans is primarily caused bytype Aand B virusesof the Orthomyxoviridae family. The influenza virus is a single-stranded RNA that has 3 membrane proteins that help the virus enter into human cells, replicate and disperse to infect other cells: ...
Type C infection usually causes either a very mild respiratory illness or no symptoms at all. It does not cause epidemics and does not have the severe public health impact of influenza types A and B. Efforts to control the impact of influenza are aimed at types A and B, and the ...
and developing new effective antivirals is an urgent need. One of the most promising new targets for influenza antiviral therapy is non-structural protein 1 (NS1), a highly conserved protein exclusively expressed in virus-infected cells that mediates essential functions in virus replication and ...
‡Safety results for the Fluzone High-Dose and investigational Fluzone High-Dose containing the alternate B influenza strain recipients were pooled for the analysis. §Grade 3: A type of AE that interrupts usual activities of daily living, or significantly affects clinical status, or may require...