What is the Difference Between Flu A and B?

The main differences between influenza A and B are the host range, disease severity, and genetic structure. Here are the key differences:

• Host Range: Influenza A viruses can infect a wide range of animals, including birds and humans, while influenza B viruses primarily infect humans. Influenza A has many subtypes and is found in various animal species, making it a potential source of pandemics when new strains jump to humans. In contrast, influenza B has only two lineages and does not have the same pandemic potential.
• Disease Severity: In the past, doctors thought that influenza A infections were more severe than influenza B. However, studies have shown that both types result in similar numbers of hospitalizations and deaths in adults. In children, influenza B may cause more severe disease and is associated with higher rates of mortality.
• Genetic Structure: Influenza A viruses are further classified into subtypes, while influenza B viruses are classified into two lineages: B/Yamagata and B/Victoria. Influenza A viruses mutate more rapidly than influenza B viruses, which makes them more challenging for scientists to keep up with.

Both influenza A and B viruses cause seasonal flu outbreaks, and the severity of the disease can vary depending on factors such as the specific strain and the individual's immune system.

Comparative Table: Flu A vs B

Here is a table comparing the differences between Flu A and Flu B:

Please note that the table is based on the available information from the search results.