Influenza (commonly known as flu) is a highly contagious illness caused by a group of viruses called the orthomyxoviruses. Infection with these viruses leads to a self-limiting illness usually characterized by fever, muscle aches, fatigue, and upper...

Influenza is an infectious disease caused by the influenza virus. The term influenza is used to describe influenza and other similar illnesses. The general symptoms of influenza, also known as the flu or grippe, are chills, headache, fever, weakness...

Commonly known as ‘flu’. It is an acute viral disease of the respiratory tract. Typical symptoms include fever, headache, myalgia (muscular pain), sore throat, cough and malaise. Gastrointestinal symptoms, such as diarrhoea and vomiting,...

Influenza is a highly infectious disease that affects the respiratory (breathing) tract. It is also known as the flu or grippe. The disease is caused by a virus. When inhaled, the virus attacks cells in the upper part of the respiratory system and...

Influenza, commonly known as flu, is an infectious disease of birds and mammals caused by RNA viruses of the family Orthomyxoviridae (the influenza viruses). In humans, common symptoms of influenza are fever, sore throat, muscle pains, severe headache,...

Racetracks across Australia were all but shut down Saturday, the country's richest horse race is in doubt and losses could total more than a billion dollars after an outbreak of equine influenza.The highly contagious equine virus was discovered in 11 non-racehorses at the Centennial Park...

The government's work to prevent an influenza pandemic took on a more academic look Monday when it selected six universities and medical centers to help lead research efforts.The Department of Health and Human Services will spend $23 million a year for the next seven years...

A less common strain of flu has shown hints of resistance to two flu drugs among patients in a small study in Japan, a country known for prescribing the drugs more frequently than anywhere else in the world.Signs of resistance to the drugs Tamiflu and...

Flu season is almost here, and a new study finds that skipping that annual flu shot could have serious consequences for older people.The 10-year study of seniors included those from the Portland area. It found that vaccination against influenza was associated with a 27 percent...