What is antigenic shift in influenza viruses?

Feb 10, 2025 ... What causes body aches? ... Viral infections, such as the flu, COVID-19 or common cold, and some bacterial infections can cause widespread body ... Sepsis is the body's extreme reaction to any type of infection. The flu, which is a viral infection, can cause secondary complications such as sepsis. May 1, 2023 ... Infectious Agent. Influenza is caused by infection of the respiratory tract with influenza viruses, RNA viruses of the Orthomyxovirus genus. What Causes Influenza? The root cause of the illness is infection from one of the influenza A, B or C viruses. These viruses infect the nose, throat, and ... The deadliest pandemic of the 20th century. The 1918 influenza outbreak was caused by a new strain of the influenza A virus that started in birds (H1N1). After ... Influenza seasonality: underlying causes and modeling theories. J Virol. 2007 Jun;81(11):5429-36. doi: 10.1128/JVI.01680-06. Epub 2006 Dec 20. Sep 19, 2024 ... In infants, RSV can cause pneumonia or bronchiolitis, and people over the age of 50 or those with heart or lung disease are also at risk for ... Flu can last from a few days to two weeks. Symptoms like fever and body aches can come on suddenly but usually go away faster than other symptoms. A cough or ... Jul 8, 2019 ... Equine influenza is a highly contagious respiratory disease of horses caused by subtypes of the influenza A virus. May 18, 2023 ... The flu can affect your sense of smell and taste. If you're experiencing a loss of taste and smell, it's important to stay hydrated and talk to your doctor.