The flu shot contains a killed form of several types of flu viruses. The vaccine causes your immune system to make antibodies. Then, if you are exposed to the flu later, the antibodies can attack and destroy the virus.
It takes about 2 weeks for your body to make the antibodies. So it's best to get the flu vaccine as soon as it's available. But the vaccine can still help if you get it during the flu season.
There are different ways to get a flu vaccine. Ask your doctor what is right for you.
Flu viruses change quickly, so each year scientists make a new vaccine. To have the best chance of being protected, you need to get a flu vaccine every year. You can't get the flu from a flu vaccine.
It is recommended that adults ages 65 and older get a high-dose flu shot.2
The CDC recommends that everyone age 6 months or older should get a flu vaccine each year.
A flu vaccine is especially important for people who are at high risk for getting other health problems from the flu. This includes:
The flu vaccine is also important for people who could spread the flu to others who are at high risk. This includes:
Children younger than 6 months of age and people with severe, life-threatening allergies to the flu vaccine or any part of the vaccine should not get a flu vaccine.
Talk to your doctor before getting a flu vaccine if you:
People who can't get a flu vaccine but are at risk from the flu may be able to take an antiviral medicine instead.
The flu vaccine may keep you from getting the seasonal flu. This can save you time (fewer days missed from work or school) and money (fewer doctor visits, medicines, and hospital costs). The flu vaccine can also help prevent the spread of the flu to others. If you are pregnant, it can help prevent your newborn baby from getting the flu.1
If you do get the flu, your symptoms may be milder and you may be less likely to have other health problems from the flu.
The flu shot may cause mild problems, such as soreness, redness, and swelling on the arm where you got the shot. You might also have a fever and muscle aches for a day or two after you get the vaccine.
The flu vaccine can't cause the flu.
The risk of a serious problem from the flu vaccine (such as a bad allergic reaction) is very small.
Get the flu vaccine | Don't get the flu vaccine | |
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What is usually involved?
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What are the benefits?
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What are the risks and side effects?
| What are the risks and side effects?
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Are you interested in what others decided to do? Many people have faced this decision. These personal stories may help you decide.
These stories are based on information gathered from health professionals and consumers. They may be helpful as you make important health decisions.
"I am in very good health for my age. Still, I get a flu shot every year. Why take chances? I've seen too many friends end up in the hospital because they didn't take the flu seriously. I urge my kids to get it too, because you never know how nasty this year's flu strain might be."
— Bert, age 68
"My grandmother is in a nursing home, and I visit her every couple of weeks. I wouldn't want to risk giving her the flu, so I'm going to get the flu vaccine."
— Betsy, age 17
"At my age, I don't see any reason to get a flu vaccine. I'm very strong, and I hardly ever get sick. I'm not worried about getting the flu."
— Quincy, age 25
Your personal feelings are just as important as the medical facts. Think about what matters most to you in this decision, and show how you feel about the following statements.
Reasons to get a flu vaccine
Reasons not to get a flu vaccine
I'll do whatever I can to avoid getting the flu.
I'm not worried about getting the flu.
I can't afford to get sick and miss work or school.
I'm not worried about getting sick and missing work or school.
I'm a big believer in vaccines.
I don't trust vaccines.
I'm worried about getting other serious health problems from the flu.
I'm more worried about side effects from the vaccine.
My other important reasons:
My other important reasons:
Now that you've thought about the facts and your feelings, you may have a general idea of where you stand on this decision. Show which way you are leaning right now.
Getting a flu vaccine
NOT getting a flu vaccine
1. Can you get the flu from a flu vaccine?
2. Is a flu vaccine safe for everyone?
3. Should you get a flu vaccine if you have a long-term (chronic) disease, such as diabetes or heart disease, or a weak immune system?
1. Do you understand the options available to you?
2. Are you clear about which benefits and side effects matter most to you?
3. Do you have enough support and advice from others to make a choice?
1. How sure do you feel right now about your decision?
2. Check what you need to do before you make this decision.
By | Healthwise Staff |
Primary Medical Reviewer | E. Gregory Thompson MD - Internal Medicine |
Primary Medical Reviewer | Adam Husney MD - Family Medicine |
Primary Medical Reviewer | Kathleen Romito MD - Family Medicine |
Primary Medical Reviewer | Christine Hahn MD - Epidemiology |
Primary Medical Reviewer | JoLynn Montgomery PA - Family Medicine |
Primary Medical Reviewer | Heather Quinn MD - Family Medicine |