What is Type A and B influenza?
Influenza types There are three main types of influenza: Type A. The most common form of influenza, type A can spread from animals to humans and is known to cause pandemics. Type B. Similar to type A, influenza B is also highly contagious and can have dangerous effects on your health in more severe cases.
How many variants are there of influenza A and B?
There are four types of influenza viruses: A, B, C and D. Human influenza A and B viruses cause seasonal epidemics of disease (known as flu season) almost every winter in the United States. Influenza A viruses are the only influenza viruses known to cause flu pandemics, i.e., global epidemics of flu disease.
What are the subtypes of influenza A?
Five subtypes of avian influenza A viruses are known to have caused human infections (H5, H6, H7, H9, and H10 viruses). The most frequently identified subtypes of avian influenza A viruses that have caused human infections are H5, H7 and H9 viruses.
Are influenza A and B different strains?
There are actually four different types of influenza viruses: influenza A, B, C, and D. 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.
How many flu variants are there each year?
According to the Centers for Disease Control and Prevention (CDC), there are four types of flu viruses: influenza A, B, C, and D. The seasonal flu viruses that humans face every winter season in the United States are caused by human influenza A.
What are the three types of influenza?
There are three types of flu viruses: A, B, and C. Type A and B cause the annual influenza epidemics that have up to 20% of the population sniffling, aching, coughing, and running high fevers. Type C also causes flu; however, type C flu symptoms are much less severe.
Which is worse influenza A or influenza B?
Type A influenza is generally considered worse than type B influenza. This is because the symptoms are often more severe in type A influenza than in type B influenza. Type A influenza is more common than type B influenza. Researchers suggest that most adults have considerable immunity against type B influenza.
What causes flu variants?
Most commonly, human infections with variant viruses occur in people with exposure to infected pigs (e.g., children near pigs at a fair or workers in the swine industry). This is thought to happen mainly when an infected pig coughs or sneezes and droplets with influenza virus in them spread through the air.
Does the flu have variants?
According to the Centers for Disease Control and Prevention (CDC), there are four types of flu viruses: influenza A, B, C, and D.