Flu— short for influenza — is a virus that can cause fever, chills, sore throat, stuffy nose, headache, and muscle aches. Flu is very serious when it gets in your lungs. Older adults are at a higher risk for developing serious complications from the flu, such as pneumonia.
The flu is easy to pass from person to person. The virus also changes over time, which means you can get it again. To ensure flu vaccines remain effective, the vaccine is updated every year.
Everyone age 6 months and older should get an annual flu vaccine, but the protection from a flu vaccine can lessen with time, especially in older adults. Still, you are less likely to become seriously ill or hospitalized with the flu if you get the vaccine. A flu vaccine is especially important if you have a chronic health condition such as heart disease or diabetes.
Ideally, you should get your vaccine by the end of October each year so you are protected when the flu season starts. It takes at least two weeks for the vaccine to be effective. However, if you have not received your flu vaccine by the end of October, it’s not too late — flu season typically peaks in December or January. As long as the flu virus is spreading, getting vaccinated will help protect you.
There are flu vaccines designed specifically for older adults. The CDC recommends that people, aged 65 and older, receive a higher-dose flu vaccine or an adjuvanted flu vaccine (one with an additional ingredient called an adjuvant that helps create a stronger immune response). These vaccines are potentially more effective than the standard flu vaccine for people in this age group. Talk with a health care provider or pharmacist about which vaccine is best for you.
You can get a flu vaccine at a doctor’s office or a local health department, as well as at many grocery stores, drug stores, and pharmacies. The ingredients of a specific vaccine are the same wherever you receive it.
Source:
https://www.nia.nih.gov/health/immunizations-and-vaccines/vaccinations-and-older-adults