Does the H1N1 Virus Still Exist? Causes & Risk Factors - Verywell Health
The H1N1 virus—known as swine flu—is one type of influenza A virus. Influenza A(H1N1) viruses still exist today. Scientists call it the A (H1N1)pdm09 virus. Influenza type A and type B viruses cause disease epidemics in people during flu season. During most years, this is the winter months. The H1N1 virus emerged during the 2009–2010 flu season, when it caused a pandemic. It is often called swine flu because it is a combination of influenza viruses that infect pigs, birds, and humans. Today, it is one of the strains that causes seasonal flu. The H1N1 virus causes common flu symptoms in most people. Those who are pregnant, have a chronic health problem, or have a weakened immune system have a higher risk of severe effects from this virus. This article describes H1N1 virus history, causes, and risks. Elena Medoks / Getty Images What Was the Swine Flu Pandemic in 2009? The swine flu pandemic in 2009 was a global outbreak of the infl