- Where does the influenza virus come from?
- Where do viruses go after flu season?
- What type of virus is Influenza B?
- Is Flu A or B worse?
- What is H and N flu?
- Is influenza A human virus?
- How many Influenza A viruses are there?
- How long is the flu contagious?
- How is flu B treated?
- What sort of virus is influenza?
- Is influenza A DNA virus?
Where does the influenza virus come from?
Answer: Influenza is a virus that’s spread from person to person.
It originates, actually, among birds and other animals such as pigs, and new viral strains of influenza come to this country and to Europe from Southeast Asia..
Where do viruses go after flu season?
The influenza A virus does not lie dormant during summer but migrates globally and mixes with other viral strains before returning to the Northern Hemisphere as a genetically different virus, according to biologists who say the finding settles a key debate on what the virus does during the summer off season when it is …
What type of virus is Influenza B?
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.
Is Flu A or B worse?
Which is worse: influenza A or influenza B? Influenza type A and type B are similar, but type A is overall more prevalent, sometimes more severe, and can cause flu epidemics and pandemics.
What is H and N flu?
Influenza A viruses are classified by subtypes based on the properties of their hemagglutinin (H) and neuraminidase (N) surface proteins. There are 18 different HA subtypes and 11 different NA subtypes. Subtypes are named by combining the H and N numbers – e.g., A(H1N1), A(H3N2).
Is influenza A human virus?
What is type A influenza? Influenza — also known as the flu — is a contagious viral infection that attacks your respiratory system. Influenza viruses that infect humans can be classified into three main groups: A, B, and C. Type A influenza infection can be serious and cause widespread outbreaks and disease.
How many Influenza A viruses are there?
There are 16 different types of HA and 9 different types of NA, therefore, there are potentially 144 different subtypes of influenza A viruses. Among them, two subtypes of influenza A, H1N1 and H3N2, most commonly infect humans.
How long is the flu contagious?
When Flu Spreads Most healthy adults may be able to infect others beginning 1 day before symptoms develop and up to 5 to 7 days after becoming sick. Children and some people with weakened immune systems may pass the virus for longer than 7 days.
How is flu B treated?
Several over-the-counter medications can help ease the symptoms of influenza. These are available from drug stores. In severe cases, a doctor may prescribe a course of antiviral drugs. Oseltamivir (Tamiflu) and zanamivir (Relenza) are drugs that doctors may use to treat type A or type B influenza.
What sort of virus is influenza?
Influenza viruses belong to the family Orthomyxoviridae and have a single-stranded segmented RNA genome. The influenza viruses are classified into types A, B, and C on the basis of their core proteins.
Is influenza A DNA virus?
Like all living things, influenza makes small errors—mutations—when it copies its genetic code during reproduction. But influenza lacks the ability to repair those errors, because it is an RNA virus; RNA, unlike DNA, lacks a self-correcting mechanism. As a result, influenza is not genetically stable.