How can one determine whether it is influenza A or influenza B?

Methods to differentiate between influenza A and influenza B generally include the following: 1. Understanding the symptoms. Influenza A is an acute infectious disease, with main symptoms including fever, cough, headache, muscle aches, and fatigue. Influenza B is a chronic infectious disease, primarily presenting symptoms such as fever, cough, fatigue, and chest pain. 2. Blood tests. Influenza A typically leads to elevated levels of white blood cells and a higher lymphocyte ratio in the blood, whereas influenza B results in a higher neutrophil ratio. 3. Laboratory tests, such as serological testing, breath tests, and bacterial cultures. Influenza A causes high levels of IgM antibodies in serological tests, while influenza B leads to high levels of IgG antibodies. 4. Viral nucleic acid testing. Influenza A will yield a positive result for viral nucleic acid detection, whereas influenza B will result in a negative nucleic acid test.