We've all heard of "the flu" but when it comes to types, subtypes and variants, influenza can get a bit complicated.

There are different types and subtypes of flu. We’ll take a look at influenza A vs. B in terms of prevalence, how contagious they are, what the vaccine covers, and severity and recovery. While ...

As the Centers for Disease Control and Prevention (CDC) explains, bird flu is a disease caused by the influenza A virus. At the same time, recent CDC data shows that seasonal influenza A is rising ...

What’s the difference between influenza A and influenza B, and does it matter which you catch? By Knvul Sheikh Each fall and winter, the flu emerges as a formidable force, spreading through the ...

Influenza A is further divided into subtypes. You may have heard of H1N1 or H3N2 – those are the two dominant types of influenza A circulating right now, according to the CDC.

The influenza virus that caused the 1968 pandemic, in contrast, had a different HA subtype, H3, and a different NA subtype as well, N2. As a result, it is classified as influenza A (H3N2).

Also, humans can transmit the subtype H5N3 influenza virus. Aerosolized droplet-transmissible viruses represent a unique threat, as they are not dependent on direct contact between persons and can ...

Birds can be infected by influenza A viruses and their subtypes but can’t carry type B or C influenza viruses. There are three main avian flu subtypes, including H5, H7, and H9.

H3N2 is a subtype of the influenza A virus that has been responsible for two outbreaks of infection in the last 60 years. H3N2 is a major strain of seasonal flu every year and vaccines can provide ...

Unlike past flu shots, flu vaccines for the 2024-2025 season don't contain the "Yamagata lineage" of influenza viruses because evidence suggests that type of flu no longer exists.

We've all heard of "the flu" but when it comes to types, subtypes and variants, influenza can get a bit complicated. According to the U.S. Centers for Disease Control and Prevention (), nearly ...