Previous seasonal flu infections and vaccinations may protect us against infection from the highly pathogenic H5N1 bird flu outbreak.

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.

Further testing suggested she had a high viral load of a novel influenza A infection, which researchers eventually discovered to be avian flu caused by the H5N1 virus.

First U.S. bird flu death reported in Louisiana patient, officials say The patient, who was older than 65 and had underlying medical conditions, was hospitalized weeks ago in critical condition ...

Public health experts share concerns that the H5N1 bird flu outbreak could turn into a pandemic. What to know after Louisiana resident died in January.

Q: What factors could prevent H5N1 from causing a pandemic? Nissly: In general, the less a virus is able to multiply in a population, the less likely it will mutate and become better able to infect.

What Is Bird Flu? Bird flu, also referred to as H5N1 or highly pathogenic avian influenza (HPAI), is a disease caused by the influenza type A virus that primarily spreads among birds.

Highly pathogenic avian influenza A(H5N1) viruses have caused widespread infections in dairy cows and poultry in the United States, with sporadic human cases. We describe characteristics of human A ...

A person in Louisiana is hospitalized with H5N1 bird flu after having contact with sick and dying birds suspected of carrying the virus, state health officials announced Friday.