superflu

Superflu is a historical term that was used to refer to influenza, the contagious respiratory illness caused by influenza viruses. In modern medical usage, the term is largely obsolete and influenza or flu is used instead. The designation appears in older English-language texts and writings, often in the context of past epidemics or public health discussions.

Influenza viruses are grouped into types A, B, and C. Influenza A and B are responsible for the seasonal epidemics that occur most winters, while influenza C generally causes milder illness. Transmission occurs primarily via respiratory droplets from coughing or sneezing, and less commonly through contaminated surfaces. Typical symptoms include fever or chills, cough, sore throat, body or muscle aches, fatigue, and sometimes headache. Most infections resolve within a week, but the disease can be more serious in young children, the elderly, pregnant people, and individuals with certain chronic health conditions. Complications can include pneumonia, secondary bacterial infections, and exacerbations of existing illnesses.

Prevention relies on annual vaccination, which is reformulated to match circulating strains. Vaccination remains the best defense for reducing severe disease and death. Additional measures include good hand hygiene, respiratory etiquette, and staying home when ill. Antiviral medications, such as neuraminidase inhibitors, can shorten illness and lessen complications when started early, particularly for high-risk individuals or those with severe symptoms.

The term superflu is now rarely used in scientific or clinical contexts, and should not be confused with the physics term superfluid or with other uses of the word in different domains.