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The influenza A and B versions that can infect humans have different proteins and they behave a little differently. ... (Learn the difference between Covid-19 symptoms vs. flu symptoms.)
Flu. Symptoms. Sore throat, runny or stuffy nose and cough are all symptoms that the flu (aka influenza) shares with other respiratory viruses. ... and influenza A and B (the viruses that cause ...
Rapid influenza diagnostic tests (RIDTs) are a simple way of obtaining assay results, are low cost, and produce results in less than 30 minutes, so they are commonly used, but they can not distinguish between influenza A virus and influenza B virus or between influenza A virus subtypes and are not as sensitive as nucleic-acid based tests. [1] [62]
Symptoms include shortness of breath, weakness, fever, coughing and fatigue. [3] A routine chest X-ray is not always necessary for people who have symptoms of a lower respiratory tract infection. [4] Influenza affects both the upper and lower respiratory tracts. [citation needed]
The CDC classifies flu viruses as A, B, C, and D. Types A and B are seasonal flu, and influenza A is broken down further into subtypes and strains. For example, current subtypes include H1N1 and H3N2.
Looking into influenza B specifically, Thomas Francis Jr. isolated influenza B virus in 1936. However, it was not until 1940 that influenza B viruses were discovered. [24] In 1942, a new bivalent vaccine was developed that protected against both the H1N1 strain of influenza A and the newly discovered influenza B virus. [25]
For the most part, symptoms have remained the same. Though there's talk of the variant possibly leading to more severe disease and additional GI symptoms like diarrhea, nothing has been confirmed.
There are four different types of influenza virus: A, B, C, and D. Influenza C usually causes only mild illness while D mostly affects animals, especially cattle. The influenza A and B versions ...