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.

Dec 21, 2018 · Type A Influenza can have life-threatening complications if left untreated. Read more to learn about prevention, symptoms, and treatments.

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.

Learn about flu, including symptoms, prevention methods, and treatment options.

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 19, 2025 · Overview Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are different from …

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, chills, …

Nov 26, 2025 · Learn the key symptom differences between flu strains, which is more dangerous, and how the vaccine protects you from both Flu A and B, per experts.

Oct 27, 2025 · Learn About Flu Influenza (flu), also referred to as seasonal flu, is a highly contagious respiratory illness caused by influenza viruses.

May 23, 2025 · Influenza, commonly known as flu, is a contagious respiratory illness caused by influenza viruses. Symptoms include fever, cough, sore throat, and body aches. Understanding flu …