Influenza hemagglutinin subunit vaccines are more effective and offer better cross protection against various influenza virus ...

There are four types of influenza virus. Influenza A is the most common, followed by influenza B. Both are highly contagious and have similar symptoms, including fever, chills, and body aches ...

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 ...

The isolation of influenza virus 80 years ago in 1933 very quickly led to the development of the first generation of live-attenuated vaccines. The first inactivated influenza vaccine was ...

Two types of influenza viruses are responsible for seasonal flu outbreaks: Influenza A and B. Influenza A accounts for around 75 percent of all cases and tends to cause more severe illness in adults.

The last type of flu virus, influenza D, mostly affects cattle. No cases of infection or illness have been reported in people. The flu is linked to about 3,000-49,000 deaths and 200,000 ...

Influenza A is believed to be the most severe type of flu virus for humans, although this is the subject of debate, as there is some evidence to suggest that influenza B might be equally as dangerous.

U.S. experts had been bracing for an outbreak, watching successful strains of the H5N1 influenza virus proliferate in Europe and elsewhere. Now that the virus is here, it shows no sign of going away.

1918-19 "Spanish flu" A -- Caused the highest known influenza-related mortality: almost 700,000 deaths occurred in the U.S., and between 50 million to 100 million worldwide 1957-58 "Asian flu" A ...

As health officials continue to track and manage one of the largest bird flu outbreaks in recorded history, the virus is beginning to spill over into mammals – including humans. While human ...

By Brenda Goodman, CNN (CNN) — Spikes of influenza A virus seen in wastewater samples from 59 sewer systems across 18 different states this spring may point to the spread of the H5N1 avian ...