Which is more severe, Type A or Type B influenza?

The severity of influenza A (H1N1) and influenza B cannot be generalized, as their severity depends on multiple factors, including the characteristics of the viral strain, the health status, and the immune system of the infected individual. Influenza A (H1N1), in certain situations, may be more severe. The influenza A virus has a high degree of variability and can cause widespread epidemics or even pandemics. It can infect not only humans but also other animals, increasing the likelihood of new viral strains emerging, which may lead to broader transmission and more severe illness. Symptoms of influenza A are usually more severe, including high fever, body aches, headache, coughing, and a longer disease course. Although influenza B is also contagious, it generally causes milder illness and is less likely to cause large-scale outbreaks. It mainly affects humans and spreads relatively slowly, typically causing localized epidemics. However, in certain situations, influenza B may also cause serious health problems, such as respiratory infections, cardiovascular disease, and kidney disease. Therefore, it is important to receive the influenza vaccine in a timely manner and maintain good personal hygiene habits.