Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle …

From spring of 1918 to spring of 1919, the flu causes more than 550,000 deaths in the U.S. and more than 20 million deaths worldwide. In the fall of 1918 at Mayo Clinic, people with the flu …

2018年2月28日 · Influenza has likely been around for millennia, though its cause was only identified relatively recently. One of the earliest reports of an influenza-like illness comes from …

Origin of Pandemic Influenza Viruses . The predominant natural reservoir of influenza viruses is thought to be wild waterfowl (Webster et al., 1992). Periodically, genetic material from avian …

We know now that influenza, or flu, is caused by a virus – but for many years it was thought to be caused by a bacterial infection. In 1892, German scientist Richard Pfeiffer isolated a small …

The term influenza was first used to describe a disease prevailing in 1357. [31] [36] It would be applied again to the epidemic in 1386−1387. [37] Italy: 1386–1387: Epidemic: An epidemic of …

2024年12月16日 · Influenza pandemic of 1918–19, the most severe influenza outbreak of the 20th century and among the most devastating pandemics in human history. The outbreak was …