How to differentiate between type A and type B influenza

Influenza A and influenza B refer to two types of influenza viruses. Influenza A virus has strong host-crossing ability and can cause influenza infections in both humans and animals. In contrast, influenza B virus spreads only among humans and lacks the ability to cross species barriers for infection. The most important way to differentiate between influenza A and B is through testing for viral strains and host-crossing capability, which can be achieved using conventional and molecular virological methods. These techniques can accurately identify specific variant genes within viral strains and detect host-crossing potential, thereby determining the virus type. Additionally, serological antibody-based antigen tests can be used to identify and distinguish specific influenza A and B viral strains. Therefore, testing for viral strains and host-crossing capability, along with serological antibody testing, are the most effective approaches for differentiating between influenza A and B viruses, helping to guide appropriate treatment strategies.