influenza a & b

Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world. Characteristic of many RNA genome viruses influenza virus undergoes high mutation rates and frequent genetic reassortment combination and.

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The influenza viruses are classified into types A B and C on the basis of their core proteins.

. Influenza is a respiratory infection caused by influenza viruses. Type A viruses are further subdivided according to their envelope glycoproteins with haemagglutinin HA or neuraminidase NA activity. Influenza B often co-circulates with influenza A during the yearly outbreaks.

Côte dIvoire reported elevated detections of influenza AH3N2 and influenza B Victoria lineage detections while Togo reported sporadic detections of both viruses. The flu vaccine is given to people who. Hib infections used to be a serious health problem in the UK but the routine immunisation against Hib given to babies since 1992 means these infections are now rare.

The symptoms of influenza are similar to the symptoms caused by other less severe viral infections. Influenza flu is a viral infection affecting the lungs and airways. Type A and B cause the annual influenza epidemics that have up to 20 of the population sniffling aching coughing and.

And influenza C causes mild or asymptomatic disease similar to the. What is influenza flu. Only a few influenza BVictoria lineage detections.

Type B flu viruses are common among humans according to the NIH. Receive a carers allowance or are the main carer for an older or disabled person who may be at. Are in a long-stay residential care.

It typically causes milder flu symptoms than influenza A and affects children more. A B and C. Of the small number of cases that do occur nowadays most affect adults with.

Type B influenza can be just as severe as type A influenza but is less common throughout the flu season compared to type A. There are three types of flu viruses. Haemophilus influenzae type b Hib is a bacterial infection that can cause a number of serious illnesses particularly in young children.

The symptoms can appear very quickly and include. Influenza B is one type of influenza virus that can cause the flu. Type A usually has the most severe flu symptoms and most frequently leads to extreme illness including hospitalization and even death according to the Centers for Disease Control and Prevention CDC.

Influenza A is more virulent and occurs more frequently. Generally influenza B causes less severe clinical illness although it can still be responsible for outbreaks. Humans are the natural host for type B infection.

Influenza A and B viruses circulate and cause seasonal epidemics of disease. Influenza A occurs more frequently and is more virulent. Influenza B presents a milder course of disease but still has the potential to cause outbreaks.

This limited host range is apparently responsible for the lack of associated influenza pandemics in contrast with those caused by the morphologically similar influenza A virus as both mutate by both antigenic. Influenza is a highly contagious respiratory illness caused by influenza virus. The symptoms of Type B are similar to Type A.

It is responsible for local outbreaks larger epidemics and pandemics. Influenza B virus is known only to infect humans and seals. Are 50 and over including those wholl be 50 by 31 March 2022 have certain health conditions.

There are 4 types of seasonal influenza viruses types A B C and D. Influenza B virus is the only species in the genus Betainfluenzavirus in the virus family Orthomyxoviridae. The seasonal flu epidemics are caused by two main types of influenza viruses A and B which infect around 10 of the population every year.

Influenza A viruses are further classified into subtypes according to the combinations. There are two main types of human influenza viruses. Influenza is a highly infectious acute respiratory infection caused by influenza viruses of which there are three types A B and C.

Ghana and Senegal reported decreasing detections of influenza AH3N2 and Burkina Faso reported a single AH3N2 detection. There are also many sub-types and strains. Flu can occur throughout the.

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