Dec 21, 2018 · Influenza viruses that infect humans can be classified into three main groups: A, B, and C. Type A influenza infection can be serious and cause widespread outbreaks and …

Jan 22, 2025 · Influenza A and influenza B are the main strains of flu virus. Type A causes more cases, more severe illness and infects many species. Type B only infects humans.

Oct 19, 2025 · Influenza A often causes fever, cough, and fatigue. This highly contagious virus primarily affects the respiratory system, including your nose, throat, and lungs.

Nov 14, 2025 · Flu A and flu B are both types of the influenza virus. Find out how they differ, who they impact most, and how to protect yourself this flu season.

Dec 18, 2025 · Type A flu explained in depth, including symptoms, risks, treatment options, prevention, and clinical insights you need to know.

Sep 26, 2025 · There are four types of influenza viruses: A, B, C, and D. Influenza A and B viruses cause seasonal epidemics of disease in people (known as flu season) almost every …

Influenza A virus, or IAV is a pathogen with strains that cause seasonal flu in humans; it can also infect birds and some mammals. [1] Strains of IAV circulate constantly in bats, pigs, horses, …

Nov 26, 2025 · In particular, experts are concerned about a new flu variant of H3N2, a type of influenza A strain, called subclade K. This variant fueled an unusually severe flu season in …

Jun 26, 2025 · Flu A is the most common of the two. It can infect both humans and animals and tends to have more mutations. That means it’s more likely to lead to complications. It tends to …

May 2, 2025 · Influenza A is an acute respiratory viral infection (ARI), a respiratory illness caused by infection with the influenza A virus H1N1, characterized by the sudden onset of high fever, …