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how long does a flu shot last in your system

A 54-year-old member asked:
Dr. Joseph Roosth
34 years experience Internal Medicine
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 fr ... Read More
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A 61-year-old female asked:
Dr. Gurmukh Singh
48 years experience Pathology
Normal reaction: Some soreness at the site of injection is normal. Flu shot does not produce antibodies to Nonovirus.
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1 thank
A 45-year-old female asked:
Dr. Edgar Mendizabal
54 years experience Internal Medicine
3 days: Shoulder discomfort might a little longer.
A member asked:
Dr. Gurmukh Singh
48 years experience Pathology
Not due to flu shot: Flu shot is not likely to be the cause of your insomnia.
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1 thank
A 41-year-old female asked:
Dr. (Liz)Phuong Tran
34 years experience Family Medicine
Few days: It will go away soon, you can take anti-inflammatory such as advil or ibuprofen.
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2 thanks
A 40-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Yes: Each flu shot is good for one flu season. H1N1 is covered with the current flu shot. 2014 – 2015 Flu Shots: Trivalent works against 3 influenza viru ... Read More
A 26-year-old male asked:
Dr. John Gaffney
24 years experience Psychiatry
Bypass IgA?: The flu vaccine induces cellular production of IgA, IgG, & IgM. Moreover, increasing herd immunity through vaccines protects those who are unable ... Read More
A 26-year-old female asked:
Dr. Benjamin Kalm
17 years experience Pediatrics
Many cold viruses: The most common "cold" viruses are rhinovirus, RSV, HMV, coronavirus, parainfluenza, influenza, and adenovirus. Each has many strains that can cause s ... Read More
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1 thank
A 46-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
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 d ... Read More
A 32-year-old female asked:
Dr. Hunter Handsfield
52 years experience Infectious Disease
Vaccine not perfect: Three possibilities. First, the influenza vaccine isn't 100% effective; it reduces the risk, if exposed, by about 50-60% (but also tends to reduc ... Read More
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