What are the differences between influenza A, influenza B, and norovirus?

Influenza A and Influenza B are two types of infectious RNA viruses that share similar symptoms, pathological characteristics, and transmission methods, but they also have significant differences. First, the symptoms of Influenza A and Influenza B differ. Symptoms of Influenza A include fever, fatigue, cough, back pain, and headache; symptoms of Influenza B include fever, fatigue, cough, body aches, and upper respiratory symptoms. Second, their transmission routes vary. Influenza A primarily spreads through airborne droplets, while Influenza B can spread not only through airborne droplets but also via direct contact and contaminated food. Third, the two viruses differ in antigenic properties. The antigens of Influenza A virus are relatively unstable and frequently undergo mutations, whereas those of Influenza B virus are more stable and rarely mutate. Finally, treatment approaches differ. Influenza A can be treated with antiviral influenza medications, while Influenza B is managed through intravenous fluid replacement, alleviation of allergic reactions, and antipyretic therapy.