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What is the difference between Influenza A and B? • Influenza A can come from wild birds while influenza B almost always comes from another human being. • Influenza A is commoner than B. • The protection conferred by vaccination lasts longer for influenza B than A. Read more: 1. Difference Between Flu and H1N1. 2. Difference Between Flu and Swine Flu Symptoms. 3. Difference Between Stomach Flu and Flu
Influenza A and B are the two types of influenza that cause epidemic seasonal infections nearly every year. Influenza A can be found in many species, including humans, birds , and pigs .
Unlike type A flu viruses, type B flu is found only in humans. Type B flu may cause a less severe reaction than type A flu virus, but occasionally, type B flu can still be extremely harmful. Influenza type B viruses are not classified by subtype and do not cause pandemics.
According to the CDC, there are three types of influenza viruses: influenza A, influenza B and influenza C. Influenza A and B are the two main types that routinely spread in humans and cause seasonal flu epidemics. Influenza C viruses cause only mild respiratory infections and are not thought to be responsible for epidemics. 14, 15
Symptoms. The symptoms of influenza A and B are the same: fever; fatigue; body and muscle aches; nausea and vomiting; headache; chills; dizziness; and sore throat. Just as the initial symptoms appear to get better, respiratory problems (difficulty breathing, coughing, runny nose) begin to appear.
Influenza A. Influenza is a virus that actually has hundreds of different strains. The virus mutates frequently, but the strains are classified into one of three main categories—A, B, or C. Influenza A is the group that most commonly causes illness in humans. All influenza A viruses are further broken down into H and N subtypes.
Flu season is an annually recurring time period characterized by the prevalence of outbreaks of Influenza (flu). The season occurs during the cold half of the year in each hemisphere. Influenza activity can sometimes be predicted and even tracked geographically. While the beginning of major flu activity in each season varies by location, in any specific location these minor epidemics usually take about 3 weeks to peak, and another 3 weeks to significantly diminish.