There are 4 types of influenza viruses, types A, B, C and D. Influenza A and B viruses circulate and cause seasonal epidemics of disease. Influenza A viruses are further classified into subtypes according to the combinations of the hemagglutinin (HA) and the neuraminidase (NA), the proteins on the surface of the virus. Currently circulating in ...Influenza (the flu) is a viral infection that causes symptoms like fever and chills, sneezing, coughing and a sore throat. The flu can be serious for some people, but if you are otherwise fit and healthy you usually don’t need to see a doctor. There is a vaccine available for the flu, and it’s recommended that everyone over the age of 6 ... Background. Rapid influenza diagnostic tests (RIDTs) are immunoassays that can identify the presence of influenza A and B viral nucleoprotein antigens in respiratory specimens, and display the result in a qualitative way (positive vs. negative) (1). In the United States, a number of RIDTs are commercially available.Oct 16, 2020 · This instructional video reviews the items included in the McKesson Consult® Flu Test Kit and provides an overview of step-by-step instructions for using this test kit. Mar 30, 2023 · There are four types of influenza viruses: A, B, C, and D. Influenza A and B viruses cause seasonal epidemics of disease in people (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). Full genome sequencing can reveal the approximately 13,500-letter sequence of all the genes of the influenza virus’ genome. The two influenza types (A and B) that cause seasonal epidemics have eight RNA gene segments. These genes contain instructions for making new viruses and play an important role in how influenza viruses cause infection.Full genome sequencing can reveal the approximately 13,500-letter sequence of all the genes of the influenza virus’ genome. The two influenza types (A and B) that cause seasonal epidemics have eight RNA gene segments. These genes contain instructions for making new viruses and play an important role in how influenza viruses cause infection.CoV-2 negative results are presumptive and confirmation with a molecular assay, if necessary for patient management, may be performed. All negative influenza A and B test results are The last time the state saw a significant wave of influenza B was in 2019, when 12,950 cases of influenza B were recorded. In 2020, 720 notifications of influenza B were made. There were 57 in ...As fears of a "tripledemic" die down, health officials say they are seeing an uptick of a particular strain of the flu: influenza B. According to data from the Centers for Disease Control and ...Rapid assays for the diagnosis of influenza A and B viruses in patients evaluated at a large tertiary care children's hospital during two consecutive winter seasons. J Clin Virol. 2008;41(2):143-147. Cruz AT, Demmler-Harrison GJ, Caviness AC, et al. Performance of a rapid influenza test in children during the H1N1 2009 influenza a outbreak.Sep 1, 2023 · Based on NCHS mortality surveillance data available on August 31, 2023, 6.5% of the deaths that occurred during the week ending August 26, 2023 (week 34), were due to pneumonia, influenza, and/or COVID-19 (PIC). This percentage is above the epidemic threshold of 5.5% for this week. Influenza virus from the family Orthomyxoviridae are enveloped negative-strand RNA viruses with segmented genomes containing seven to eight gene segments. Of the five genera in the family, only influenza A virus (IAV), influenza B and C viruses are medically relevant to humans. Influenza A and B viruses have a similar structure whereby these ...Similarities: Both COVID-19 and flu can have varying degrees of symptoms, ranging from no symptoms (asymptomatic) to severe symptoms. Common symptoms that COVID-19 and flu share include: Fever or feeling feverish/having chills. Cough. Shortness of breath or difficulty breathing.Feb 24, 2022 · Influenza (flu): The flu is commonly caused by type A and B influenza strains. Symptoms are typically more severe than the common cold and can include coughing, fever (or chills), muscle aches, shortness of breath, and more. Flu viruses are of four main types: A, B, C and D. Human influenza type A and B viruses are mainly responsible for the “flu season,” or seasonal influenza epidemics almost every winter in the United States. Type A influenza: This is the cause of most flu cases. It is the only influenza virus causing flu pandemics (a large number of flu ... COVID-19/Flu A&B. test has three Test lines, one for SARS-CoV-2, one for influenza A, and one for influenza B. The three Test lines allow for the separate and differential identification of ...For use with Sofia 2 and Sofia. The Sofia Influenza A+B Fluorescent Immunoassay (FIA) uses advanced immunofluorescence-based lateral-flow technology to detect influenza A and influenza B viral nucleoprotein antigens. Sofia 2 with Advance Result Technology (ART) delivers accurate, objective and automated results in as few as three minutes.Flu symptoms tend to develop one to two days after exposure to the virus and last for between five to seven days. Day 1 to Day 3 are characterized by the abrupt onset and worsening of symptoms. Day 5 to Day 6 is when most people start to feel notably better. By Day 8, most people will have recovered and no longer be contagious.Mar 10, 2020 · Objectives Timely implementation of influenza infection control and treatment can significantly reduce the impact on Hospital resources and patient management when demand is at peak. Turnaround times of Laboratory based screening tests for the diagnosis of influenza may have an impact on the implementation of infection control measures and treatment. In this study the objectives included ... CoV-2 negative results are presumptive and confirmation with a molecular assay, if necessary for patient management, may be performed. All negative influenza A and B test results are Rapid influenza diagnostic tests (RIDTs) detect influenza viral antigens in respiratory tract specimens. Available RIDTS detect and differentiate between type influenza A and B viruses, but do not specifically identify or differentiate subtypes of influenza A viruses. RIDTs are not recommended for use in hospitalized patients with suspected ...Room temperature (15°C to 30°C/59°F to 86°F) Internal controls. Positive and negative included. External controls. Positive and negative included. PPA* (versus an FDA-cleared influenza A and B molecular assay) A: 81.5%, B: 80.9%. NPA* (versus an FDA-cleared influenza A and B molecular assay) A: 97.8%, B: 99.1%.Influenza, commonly known as " the flu ", is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These symptoms begin from one to four days after exposure to the virus (typically two days) and last for about 2–8 days.Overview. Influenza virus testing is not required to make a clinical diagnosis of influenza in outpatients with suspected influenza, particularly during increased influenza activity when seasonal influenza A and B viruses are circulating in the local community. However, influenza virus testing can inform clinical management when the results may ... The CDC Influenza SARS-CoV-2 (Flu SC2) Multiplex Assay is a real-time reverse-transcription polymerase chain reaction (rRT-PCR) laboratory test that can simultaneously detect and differentiate between influenza A, influenza B, and SARS-CoV-2 in upper or lower respiratory specimens. The test is a highly accurate, nucleic acid-based diagnostic ...People who are sick with flu often feel some or all of these symptoms: Fever*/feeling feverish or chills. Cough. Sore throat. Runny or stuffy nose. Muscle or body aches. Headaches. Fatigue (tiredness) Some people may have vomiting and diarrhea, though this is more common in children than adults.The fastest molecular flu test just got faster and even better. Now with early detection and positive results in as few as 5 minutes, allowing you to make effective clinical decisions sooner. Abbott ID NOW is a rapid, instrument-based system for the qualitative detection of infectious diseases using isothermal nucleic acid amplification technology.LP248181-2 Influenza virus A & B & Respiratory syncytial virus RNA panel Influenza viruses A and B are single-stranded RNA enveloped viruses belonging to the Orthomyxoviridae family. The symptoms of infection of Influenza A and B include fever, cough, sore throat, rhinorrhea, nasal congestion, headache, myalgia and malaise.There are 4 types of influenza viruses, types A, B, C and D. Influenza A and B viruses circulate and cause seasonal epidemics of disease. Influenza A viruses are further classified into subtypes according to the combinations of the hemagglutinin (HA) and the neuraminidase (NA), the proteins on the surface of the virus. Currently circulating in ...Jan 12, 2023 · Flu symptoms for both A and B tend to appear in progression, beginning with a sudden onset of fever. Other early symptoms include: Dry cough Runny nose Sore throat Body aches Headache Fatigue When young children acquire influenza, they may experience nausea, vomiting, or diarrhea in addition to respiratory symptoms. Waner JL, Todd, SI, Shalaby H, et al. Comparison of Directigen FLU-A with viral isolation and direct immunofluorescence for the rapid detection and identification of influenza A virus. J Clin Microbiol. 1991; 29(3):479-482. 2037665 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 can classify and monitor the different types of ... Influenza types A and B. These 2 types of viruses cause widespread illness (epidemics) almost every winter. They often lead to more people needing to go to the hospital, and more people dying from the flu. Public health officials focus on stopping the spread of types A and B. One of the reasons the flu remains a problem is because the viruses ... There are two main types of influenza viruses: types A and B. Both type A and B influenza viruses regularly spread in people and are responsible for seasonal flu each year. WHAT IS THE Jun 22, 2023 · Influenza A is the most common type of influenza virus that causes the seasonal flu. Influenza A viruses are classified by subtypes based on surface proteins hemagglutinin (H) and neuraminidase (N). The viruses are named for the combination of proteins, such as A (H1N1) or A (H3N2). Influenza B. Follow recommended infection prevention and control measures1. SARS-CoV-2 Testing. Test for SARS-CoV-2 by nucleic acid detection 2. , 3 ; OR if not available, by SARS-CoV-2 antigen detection assay. 5. a) If SARS-CoV-2 Test result is positive, administer supportive care. If the patient is at high risk for progression to severe COVID-19 ... Jul 14, 2023 · The last time the state saw a significant wave of influenza B was in 2019, when 12,950 cases of influenza B were recorded. In 2020, 720 notifications of influenza B were made. There were 57 in ... For Influenza, the test demonstrated a positive percent agreement of 83.3% (Flu A) and 80% (Flu B) and a negative percent agreement of 97.5% (Flu A) and 95.3% (Flu B) versus RT-PCR, based on ...Similarities: Both COVID-19 and flu can have varying degrees of symptoms, ranging from no symptoms (asymptomatic) to severe symptoms. Common symptoms that COVID-19 and flu share include: Fever or feeling feverish/having chills. Cough. Shortness of breath or difficulty breathing.Feb 16, 2023 · indicate that influenza A and/or influenza B is likely, and diagnostic test results for other causes of illness (e.g., other respiratory illness) are negative. All negative influenza A and B test results are presumptive. It is recommended these results be confirmed by viral culture or an FDA-cleared influenza A and B molecular assay. Negative results ... Room temperature (15°C to 30°C/59°F to 86°F) Internal controls. Positive and negative included. External controls. Positive and negative included. PPA* (versus an FDA-cleared influenza A and B molecular assay) A: 81.5%, B: 80.9%. NPA* (versus an FDA-cleared influenza A and B molecular assay) A: 97.8%, B: 99.1%.Jan 12, 2023 · Nationally, flu activity during the 2021-2022 season began to increase in November and remained elevated until mid-June with two different waves of influenza A (H3N2) virus activity occurring; the first peaked in late December 2021, and the second in April 2022. Prior to the emergence of SARS-CoV-2, flu activity would most commonly begin to ... Doctors & departments Overview Flu (influenza) is an infection of the nose, throat and lungs, which are part of the respiratory system. Influenza is commonly called the flu, but it's not the same as stomach "flu" viruses that cause diarrhea and vomiting. Most people with the flu get better on their own.Dec 2, 2022 · Influenza (Flu) Viruses There are two main types of human flu viruses: types A and B. The flu A and B viruses that routinely spread in people are responsible for seasonal flu epidemics each year. Flu A viruses can be broken down into sub-types depending on the genes that make up the surface proteins. There are four types of influenza viruses: A, B, C, and D. Influenza A and B viruses cause seasonal epidemics of disease in people (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).Results are for the identification and differentiation of RNA from SARS-CoV-2, Influenza A, Influenza B and RSV. Limitations This assay is intended for use only under the Food and Drug Administration's Emergency Use Authorization.Mayo Clinic offers flu shots in Arizona, Florida and Minnesota. Your health care provider will conduct a physical exam, look for signs and symptoms of flu, and possibly order a test that detects influenza viruses. During times when flu is widespread, you may not need to be tested for it. Your health care provider may diagnose you based on your ...During the 2020-2021 flu season, there was very low circulation of seasonal flu viruses. During September 27, 2020–May 22, 2021 in the United States, 1,899 (0.2%) of 1,081,671 clinical samples tested were positive for an influenza virus (713 [37.5%] influenza A and 1,186 [62.5%] influenza B). During that same period, public health ...Flu symptoms for both A and B tend to appear in progression, beginning with a sudden onset of fever. Other early symptoms include: Dry cough Runny nose Sore throat Body aches Headache Fatigue When young children acquire influenza, they may experience nausea, vomiting, or diarrhea in addition to respiratory symptoms.types of influenza viruses: A, B, and C. Type A viruses are the most prevalent and are associated with most serious epidemics. Type B viruses produce a disease that is generally milder than that caused by type A. Type C viruses have never been associated with a large epidemic of human disease. Both type A and B viruses canWaner JL, Todd, SI, Shalaby H, et al. Comparison of Directigen FLU-A with viral isolation and direct immunofluorescence for the rapid detection and identification of influenza A virus. J Clin Microbiol. 1991; 29(3):479-482. 2037665 Jun 22, 2023 · Influenza A is the most common type of influenza virus that causes the seasonal flu. Influenza A viruses are classified by subtypes based on surface proteins hemagglutinin (H) and neuraminidase (N). The viruses are named for the combination of proteins, such as A (H1N1) or A (H3N2). Influenza B. Based on NCHS mortality surveillance data available on August 31, 2023, 6.5% of the deaths that occurred during the week ending August 26, 2023 (week 34), were due to pneumonia, influenza, and/or COVID-19 (PIC). This percentage is above the epidemic threshold of 5.5% for this week.Overview. Influenza virus testing is not required to make a clinical diagnosis of influenza in outpatients with suspected influenza, particularly during increased influenza activity when seasonal influenza A and B viruses are circulating in the local community. However, influenza virus testing can inform clinical management when the results may ...Jan 12, 2023 · Nationally, flu activity during the 2021-2022 season began to increase in November and remained elevated until mid-June with two different waves of influenza A (H3N2) virus activity occurring; the first peaked in late December 2021, and the second in April 2022. Prior to the emergence of SARS-CoV-2, flu activity would most commonly begin to ... For influenza A and influenza B viruses, selective amplification of target nucleic acid from the sample is achieved by the use of target-specific forward and reverse Jul 29, 2023 · Flu symptoms tend to develop one to two days after exposure to the virus and last for between five to seven days. Day 1 to Day 3 are characterized by the abrupt onset and worsening of symptoms. Day 5 to Day 6 is when most people start to feel notably better. By Day 8, most people will have recovered and no longer be contagious. CoV-2 negative results are presumptive and confirmation with a molecular assay, if necessary for patient management, may be performed. All negative influenza A and B test results are (SARS-CoV-2) (Coronavirus disease [COVID-19]), influenza virus types A and B, and respiratory syncytial virus, multiplex amplified probe technique Influenza/RSV and COVID-19 0240U Infectious disease (viral respiratory tract infection), pathogen-specific RNA, 3 targets (severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2], influenza A ...Yes, for some people. There are three flu vaccines that are preferentially recommended for people 65 years and older. These are Fluzone High-Dose Quadrivalent vaccine, Flublok Quadrivalent recombinant flu vaccine and Fluad Quadrivalent adjuvanted flu vaccine . This recommendation was based on a review of available studies which suggests that ... There are four types of influenza virus: influenza A, B, C, and D. Types A and B are responsible for the flu epidemics that occur in the United States most winters. Influenza, or the flu, is a ...1. INTRODUCTION. Influenza outbreaks are seen every year during the colder months of the year. Until now, four influenza pandemics have been reported, including the H1N1 (1918), the H2N2 (1957), the H3N2 (1967) and the H1N1 pandemic in 2009. 1 In addition, seasonal flu is reporting in different countries every year.As fears of a "tripledemic" die down, health officials say they are seeing an uptick of a particular strain of the flu: influenza B. According to data from the Centers for Disease Control and ...Room temperature (15°C to 30°C/59°F to 86°F) Internal controls. Positive and negative included. External controls. Positive and negative included. PPA* (versus an FDA-cleared influenza A and B molecular assay) A: 81.5%, B: 80.9%. NPA* (versus an FDA-cleared influenza A and B molecular assay) A: 97.8%, B: 99.1%.Nov 7, 2022 · A healthcare professional may be able to test for COVID-19, the flu and RSV at the same visit. Abbott offers several diagnostic tools to aid in fast, reliable respiratory virus testing. From our ID-NOW™ rapid system to the Alinity m Resp-4-Plex to the Panbio COVID-19/Flu A&B Rapid Panel test*, we are equipping clinicians with tools to ... Jul 14, 2023 · The last time the state saw a significant wave of influenza B was in 2019, when 12,950 cases of influenza B were recorded. In 2020, 720 notifications of influenza B were made. There were 57 in ... Sep 28, 2022 · Similarities: Both COVID-19 and flu can have varying degrees of symptoms, ranging from no symptoms (asymptomatic) to severe symptoms. Common symptoms that COVID-19 and flu share include: Fever or feeling feverish/having chills. Cough. Shortness of breath or difficulty breathing. Influenza epidemics, also known as seasonal flu, occur annually and are the most common emerging infection among humans. These epidemics have major medical impacts, but they are generally not fatal except in certain groups such as the elderly. Pandemics, on the other hand, happen once every few decades on average.Rapid influenza diagnostic tests (RIDTs) detect influenza viral antigens in respiratory tract specimens. Available RIDTS detect and differentiate between type influenza A and B viruses, but do not specifically identify or differentiate subtypes of influenza A viruses. RIDTs are not recommended for use in hospitalized patients with suspected ... Jun 22, 2023 · Influenza A is the most common type of influenza virus that causes the seasonal flu. Influenza A viruses are classified by subtypes based on surface proteins hemagglutinin (H) and neuraminidase (N). The viruses are named for the combination of proteins, such as A (H1N1) or A (H3N2). Influenza B. CoV-2 negative results are presumptive and confirmation with a molecular assay, if necessary for patient management, may be performed. All negative influenza A and B test results areThe assay targets the influenza A viruses (matrix gene), the influenza B viruses (matrix gene) and RSV (matrix gene). Results are reported as Detected or NOT detected and a semi-qualitative result is provided by reporting the PCR Cycle threshold (Ct) value for positive specimens. Note: Due to supply chain variables and logistical workflows to ...Oct 25, 2021 · During the 2020-2021 flu season, there was very low circulation of seasonal flu viruses. During September 27, 2020–May 22, 2021 in the United States, 1,899 (0.2%) of 1,081,671 clinical samples tested were positive for an influenza virus (713 [37.5%] influenza A and 1,186 [62.5%] influenza B). During that same period, public health ... There are two main types of influenza viruses: types A and B. Both type A and B influenza viruses regularly spread in people and are responsible for seasonal flu each year. WHAT IS THE*The BD Veritor™ System for Rapid Detection of SARS-CoV-2 & Flu A+B is intended for the in vitro, simultaneous qualitative detection and differentiation of SARS-CoV-2 nucleocapsid antigen and/or influenza A and B nucleoprotein antigens directly from anterior nasal swab samples taken from individuals who are suspected of a viral respiratory infection consistent with COVID-19 by a healthcare ...serious flu complications. There are two main types of . influenza viruses: types A and B. Both type A and B . influenza viruses regularly spread in people, and are . responsible for seasonal flu ...Influenza (flu): The flu is commonly caused by type A and B influenza strains. Symptoms are typically more severe than the common cold and can include coughing, fever (or chills), muscle aches, shortness of breath, and more.Jul 14, 2023 · The last time the state saw a significant wave of influenza B was in 2019, when 12,950 cases of influenza B were recorded. In 2020, 720 notifications of influenza B were made. There were 57 in ... Influenza A and B infect humans each flu season and are both highly contagious. While treatment and prevention are the same, flu B tends to be less common. SearchBackground. Rapid influenza diagnostic tests (RIDTs) are immunoassays that can identify the presence of influenza A and B viral nucleoprotein antigens in respiratory specimens, and display the result in a qualitative way (positive vs. negative) (1). In the United States, a number of RIDTs are commercially available.Dec 2, 2022 · Influenza (Flu) Viruses There are two main types of human flu viruses: types A and B. The flu A and B viruses that routinely spread in people are responsible for seasonal flu epidemics each year. Flu A viruses can be broken down into sub-types depending on the genes that make up the surface proteins. 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 can classify and monitor the different types of ...
The four main types of Type A and B influenza viruses that are most likely to spread and make people sick during the upcoming flu season are the targets of seasonal influenza (flu) vaccines. All of the available flu vaccinations in the United States offer protection against the influenza A(H1), A(H3), B/Yamagata, and B/Victoria lineage viruses.. Msn weather forecast and maps
For Influenza, the test demonstrated a positive percent agreement of 83.3% (Flu A) and 80% (Flu B) and a negative percent agreement of 97.5% (Flu A) and 95.3% (Flu B) versus RT-PCR, based on ...(SARS-CoV-2) (Coronavirus disease [COVID-19]), influenza virus types A and B, and respiratory syncytial virus, multiplex amplified probe technique Influenza/RSV and COVID-19 0240U Infectious disease (viral respiratory tract infection), pathogen-specific RNA, 3 targets (severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2], influenza A ... Influenza — commonly known as the flu — is a respiratory infection caused by flu viruses. There are three main types of influenza: A, B, and C. Types A and B are similar, but influenza B can ...The flu is caused by an influenza virus. Most people get the flu when they breathe in tiny airborne droplets from the coughs or sneezes of someone who has the flu. You can also catch the flu if you touch something with the virus on it, and then touch your mouth, nose, or eyes. People often confuse colds and flu.Mar 10, 2020 · Objectives Timely implementation of influenza infection control and treatment can significantly reduce the impact on Hospital resources and patient management when demand is at peak. Turnaround times of Laboratory based screening tests for the diagnosis of influenza may have an impact on the implementation of infection control measures and treatment. In this study the objectives included ... Interference was observed for flu A, flu B, RSV, and SARS-CoV-2 when evaluated with high concentrations of Pneumocystis jirovecii (PJP). There is a risk of false negative for flu A, B, RSV, and SARS-CoV-2 results under certain co-infection circumstances with Pneumocystis jirovecii (PJP). The Alinity m Resp-4-Plex assay was validated with ...Yes. There are tests that will check for seasonal influenza A and B viruses and SARS-CoV-2, the virus that causes COVID-19. Testing for these viruses at the same time gives public health officials important information about how flu and COVID-19 are spreading and what prevention steps people should take.For influenza A and influenza B viruses, selective amplification of target nucleic acid from the sample is achieved by the use of target-specific forward and reverseSeasonal influenza (flu) vaccines are designed to protect against the four main groups of flu Type A and B viruses that research indicates are most likely to spread and cause illness among people during the upcoming flu season. All current U.S. flu vaccines protect against a flu A (H1) virus, a flu A (H3) virus, a flu B/Yamagata lineage virus ...Results are for the identification and differentiation of RNA from SARS-CoV-2, Influenza A, Influenza B and RSV. Limitations This assay is intended for use only under the Food and Drug Administration's Emergency Use Authorization.Jan 12, 2023 · There are 4 types of influenza viruses, types A, B, C and D. Influenza A and B viruses circulate and cause seasonal epidemics of disease. Influenza A viruses are further classified into subtypes according to the combinations of the hemagglutinin (HA) and the neuraminidase (NA), the proteins on the surface of the virus. Currently circulating in ... The flu is an infection of the nose, throat, and lungs. It spreads easily from person to person. This article discusses influenza types A and B. A type of influenza A infection due to the H1N1 influenza strain is commonly called the swine flu. Alternative Names Table 2: Available FDA-Cleared Rapid Influenza Diagnostic Tests (Antigen Detection Only) 1. These tests provide results in 10-15 minutes and differentiate between influenza A and B. Available FDA cleared tests as of August 2020. Information for the 2023-2024 Flu Season Thursday, August 17, 2023. CDC Reports Two Human Infections with Flu Viruses From Pigs Friday, August 4, 2023. H5N1 Bird Flu Found in Polish Domestic Cats Friday, July 21, 2023. Influenza Risk Assessment Tool (IRAT) Thursday, July 6, 2023. Virus Descriptions and Report Summaries Tuesday, July 4, 2023.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 can classify and monitor the different types of ...Dec 3, 2020 · Influenza A and B infect humans each flu season and are both highly contagious. While treatment and prevention are the same, flu B tends to be less common. Search fever* or feeling feverish/chills. cough. sore throat. runny or stuffy nose. muscle or body aches. headaches. fatigue (tiredness) some people may have vomiting and diarrhea, though this is more common in children than adults. *It’s important to note that not everyone with flu will have a fever..