Does The Flu Shot Weaken Your Immune System?

Is there a downside to getting the flu shot?

Some possible downsides to flu shots include: only about 40–60% of flu shots are effective in preventing the flu each year.

they can take up to 2 weeks to start working.

sometimes, they cause mild side effects, such as pain, redness, and swelling at the injection site..

Does flu shot cause immune response?

Reactions to the flu shot: This initial soreness is most likely the result of the body’s early immune response reacting to a foreign substance entering the body. Other reactions following the flu shot are usually mild and can include a low grade fever and aches.

Should I get a flu shot if I have a weakened immune system?

Vaccines are especially critical for people with health conditions such as a weakened immune system. If you have cancer or other immunocompromising conditions, talk with your doctor about: Influenza vaccine each year to protect against seasonal flu.

How long does flu immunity last after vaccine?

How long does immunity from influenza vaccine last? Protection from influenza vaccine is thought to persist for at least 6 months. Protection declines over time because of waning antibody levels and because of changes in circulating influenza viruses from year to year.

How effective is the flu shot in 2020?

CDC’s influenza vaccination coverage reports show that overall flu vaccination coverage (among people 6 months and older) during 2019-2020 increased from the previous season to nearly 52%.

What can you not do after a flu shot?

Exercising the arm or applying a cold pack later in the day will minimize the discomfort; if necessary take ibuprofen or acetaminophen to ease the pain. Symptoms may start 6-12 hours after the flu shot. If any of these symptoms do not go away in 1-2 days or get worse see your doctor.