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Many Vaccine Information Statements are available in Spanish and other languages. See www.immunize.org/vis. Hojas de Información Sobre Vacunas están disponibles en español y en muchos otros idiomas. Visite www.immunize.org/vis.
Influenza (“flu”) is a contagious disease. It is caused by the influenza virus, which can be spread by coughing, sneezing, or nasal secretions.
Anyone can get influenza, but rates of infection are highest among children. For most people, symptoms last only a few days. They include:
Other illnesses can have the same symptoms and are often mistaken for influenza.
Young children, people 65 and older, pregnant women, and people with certain health conditions – such as heart, lung or kidney disease or a weakened immune system – can get much sicker. Flu can cause high fever and pneumonia, and make existing medical conditions worse. It can cause diarrhea and seizures in children. Each year thousands of people die from seasonal influenza and even more require hospitalization.
By getting vaccinated you can protect yourself from influenza and may also avoid spreading influenza to others.
There are two types of influenza vaccine:
A “high-dose” inactivated influenza vaccine is available for people 65 years of age and older. Ask your doctor for more information.
Influenza viruses are always changing and an annual vaccination is recommended. Each year scientists try to match the viruses in the vaccine to those most likely to cause flu that year. Flu vaccine will not prevent illness caused by other viruses, including flu viruses not contained in the vaccine.
It takes up to 2 weeks for protection to develop after the shot. Protection lasts about a year. Some inactivated influenza vaccine contains a preservative called thimerosal. Thimerosal-free influenza vaccine is available. Ask your doctor for more information.
All people 6 months of age and older should get flu vaccine. Vaccination is especially important for people at higher risk of severe influenza and their close contacts, including healthcare personnel and close contacts of children younger than 6 months.
Get the vaccine as soon as it is available. This should provide protection if the flu season comes early. You can get the vaccine as long as illness is occurring in your community.
Influenza can occur at any time, but most influenza occurs from October through May. In recent seasons, most infections have occurred in January and February. Getting vaccinated in December, or even later, will still be beneficial in most years.
Adults and older children need one dose of influenza vaccine each year. But some children younger than 9 years of age need two doses to be protected. Ask your doctor.
Influenza vaccine may be given at the same time as other vaccines, including pneumococcal vaccine.
A vaccine, like any medicine, could possibly cause serious problems, such as severe allergic reactions. The risk of a vaccine causing serious harm, or death, is extremely small.
Serious problems from inactivated influenza vaccine are very rare. The viruses in inactivated influenza vaccine have been killed, so you cannot get influenza from the vaccine.
If these problems occur, they usually begin soon after the shot and last 1-2 days.
Young children who get inactivated flu vaccine and pneumococcal vaccine (PCV13) at the same time appear to be at increased risk for seizures caused by fever. Ask your doctor for more information.
Tell your doctor if a child who is getting flu vaccine has ever had a seizure.
One brand of inactivated flu vaccine, called Afluria, should not be given to children 8 years of age or younger, except in special circumstances. A related vaccine was associated with fevers and fever-related seizures in young children in Australia. Your doctor can give you more information.
The safety of vaccines is always being monitored. For more information, visit: www.cdc.gov/vaccinesafety/Vaccine_Monitoring/Index.html and www.cdc.gov/vaccinesafety/Activities/Activities_Index.html.
Any unusual condition, such as a high fever or behavior changes. Signs of a severe allergic reaction can include difficulty breathing, hoarseness or wheezing, hives, paleness, weakness, a fast heart beat or dizziness.
VAERS does not provide medical advice.
The National Vaccine Injury Compensation Program (VICP) was created in 1986.
People who believe they may have been injured by a vaccine can learn about the program and about filing a claim by calling 1-800-338-2382, or visiting the VICP website at www.hrsa.gov/vaccinecompensation.
Vaccine Information Statement (Interim) Inactivated Influenza Vaccine (7/26/11) 42 U.S.C. §300aa-26.
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