From the Banner Health website:
A Simple Way to Keep the Flu Away
You can prevent the flu this season by taking one simple step: Get a flu vaccine. The CDC recommends everyone 6 months and older get vaccinated.
Unfortunately, some people think that getting a flu vaccine is too much trouble or costs too much. Or they are sure that a flu shot will make them sick. Or it will make them more likely to catch the flu.
The flu is also called seasonal influenza. It is caused by one of several strains of the flu virus (type A or B) that infect the nose, throat, and lungs. The flu makes life miserable for a week or two for many people. It is deadly for some. Flu season can start as early as October. It peaks anywhere from late December to early April.
Your best defense against the flu is to get vaccinated.
A flu vaccine is especially important for people who are more likely to have problems if they get the flu. This includes:
Even if you don't fall into one of the above groups, you should still get the vaccine if you want to prevent the flu and its symptoms.
Talk with your healthcare provider first
Some people shouldn't be vaccinated for the flu before talking with their healthcare provider, the CDC says. These are reasons to talk with your healthcare provider:
Children younger than 6 months of age should not be vaccinated against the flu. Flu vaccines haven't been approved for that age group.
Other prevention steps
Flu viruses are spread by contact with droplets sneezed or coughed from an infected person. Breathing in the droplets is the most common way to get the flu. Touching objects on which droplets have landed also infects many people. You can spread the virus to others before you feel sick yourself. The CDC says you are contagious a day before symptoms start and up to 5 days afterward.
You can protect yourself against the flu by doing simple things like washing your hands before eating and not putting your hands near your face or in your mouth. Washing hands for at least 20 seconds with soap and water works fine. If soap and water are not available, rub your hands with an alcohol-based hand cleaner. If someone in your family has the flu, you can help prevent it from spreading by cleaning surfaces with a solution of 1 part bleach to 10 parts water.
Rooting out rumors
Don't believe the rumor that a flu shot can give you even a mild case of the flu. It's impossible. The vaccine does not contain a form of the flu virus that can give you the flu. The injected form of the vaccine is made from pieces of dead flu virus cells. After getting the vaccine, some people have mild flu-like symptoms as a side effect. This is not the same thing as having the flu.
When you get the flu vaccine, your body reacts and makes antibodies that give you immunity against the virus.
The main reason you should be revaccinated each year is that the flu virus is constantly changing into new strains. Each year the CDC tries to figure out which flu strains will have the biggest effect. The CDC works with vaccine makers to create the specific vaccine that will fight the predicted strains for that year.
If you are concerned about the cost of a flu vaccine, check with your local health department for places near you where free flu shots are given. Many insurers also cover flu vaccines at no cost to their members.