Influenza, or “flu,” is caused by a virus that attacks primarily the upper respiratory tract. Each year, millions of people in the United States, about 10%-20% of the population, become ill with a seasonal flu. In Maine, seasonal flu usually occurs in the winter months between December and March.
The influenza virus is easily passed from person to person through the air by droplets and small particles when infected people cough or sneeze. The illness usually lasts for about a week, and it is characterized by sudden onset of high fever, headache, cough, sore throat, muscle aches, and a runny nose. Most people recover within one to two weeks without requiring any medical treatment. In the very young, the elderly, and people suffering from medical conditions, such as lung diseases, diabetes, cancer, and kidney or heart problems, seasonal influenza poses a serious health risk. In these people, the infection may lead to severe complications of underlying diseases, pneumonia, and death.
Various types of flu vaccines have been available and used for more than 60 years; they are safe and effective in preventing both mild and severe outcomes of influenza. It is recommended that elderly persons, and persons of any age who are considered at “high risk” for influenza-related complications due to underlying health conditions, should be vaccinated.
Additonal Information
Maine CDC Seasonal Influenza Information
U.S. Centers for Disease Control and Prevention Flu Information
