How long does a flu shots last?

1 Year. Influenza vaccines are given once a year. Elderly patients, health care workers, immunocompromised patients, and patients with lung disease should be sure to get the vaccine because they are at greater risk, but it's also recommended that healthy adults get the vaccine yearly.
Designed for season. The flu shot is designed to last for a given season during which a given strain of virus, e.g. HxNy, is present.

Related Questions

Long does a flu shot last usually?

A year. Good question. The influenza virus mutates rapidly so each year's vaccine varies as each year's vaccine is based on the most prevalent flu strains from the last flu season. The actual immunity derived from a given flu shot probably lasts more than one year, but it is important to get a new shot each year, due to the changes. Read more...

How long should you wait after being sick before getting a flu shot?

Get your flu shot. Your immune system can "multitask". It is unlikely at this point of the season that you have genuine influenza, and your immune system can handle whatever cold you might have currently and, as well, the inactive (dead) virus-particles that constitute the influenza vaccination. Read more...
It depends.... If you have a simple cold, even with a low grade fever, you may receive a flu vaccine. If your fever is above 101, i would wait until you feel better before receiving the vaccine. Keep in mind however, that the sooner you become immunized, the sooner you will be protected! if york are less than 50 years old and do not have active asthma, you may want to consider the nasal flu vaccine, flumist. Read more...

How long do you think is a flu shot good for?

Define "good" The flu strains mutate often & each year the predominant strains change. The flu vaccine is developed yearly using 3 strains that are circulating & already causing "flu" in so many places that a they are expected to continue.The vaccine stimulate production of antibodies to the included strains that last for years. But the flu mutates so often, last years vaccine is unlikely to stop this years flu. Read more...

For what length of time do flu symptoms from a flu shot last?

1 to 2 days usually. The flu shot has inactivated virus- so it will not infect you with the flu. If you have reactions to the shot they usually resolve within one to two days. Side effects can include a low grade fever, aches & pain, and localized swelling, redness and pain at the shot site. Some people have had allergic reactions to the flu vaccine. Read more...

How long should you wait after a tetanus shot to get a flu shot?

Don't. There is no reason to wait between these vaccines.They can be given the same day and give protection as well as if separated. Read more...