Were you looking for information about Influenza? Influensa is a common misspelling of influenza.
Influenza is a highly contagious infection of the respiratory system. It is caused by viruses that affect the nose, throat, and lungs. While influenza is usually a mild disease in healthy children, young adults, and middle-aged people, it can be life-threatening in older adults and people of any age with chronic illnesses, such as diabetes or heart, lung, or kidney disease. You can get the infection if someone around you who is infected coughs or sneezes, or simply by touching a contaminated surface.
(Click Influenza for more information on the causes, symptoms, possible complications, and transmission of influenza.)