Advertisement

What should I know about an influenza vaccine before receiving it?

An influenza vaccine is administered by intramuscular injection or by nasal spray. The vaccine for injection contains dead influenza virus particles, and the vaccine for nasal administration contains attenuated, or weakened, live viruses. For this reason, the nasal spray is intended only for people two to 49 years of age who are in good health. In any one year, the influenza vaccine does not provide protection against all flu virus strains. Each year, researchers identify the influenza strains that will most likely circulate in the autumn and make the vaccine using these strains. You also should know that an influenza vaccine takes about two weeks to provide adequate protection against influenza infection. An influenza vaccine may cause some side effects, and you should become familiar with these before getting it. Report to your doctor any side effects that concern you.

Continue Learning about Vaccine

Back-to-School Vaccinations All Preteens and Teens Need
Back-to-School Vaccinations All Preteens and Teens Need
Vaccinations are something to shine a light on as your adolescents head back to school. The Centers for Disease Control and Prevention (CDC) has the f...
Read More
Which adults need the mumps, measles, and rubella (MMR) vaccination?
Univ. of Nev. School of Medicine, Family MedicineUniv. of Nev. School of Medicine, Family Medicine
Anyone born during or after 1957 who has not had measles or been vaccinated is at risk and should ge...
More Answers
Which seniors should get the tetanus with pertussis (Tdap) vaccine?
Dr. Aruna V. Josyula, MDDr. Aruna V. Josyula, MD
All adults age 65 years or older who have or anticipate having contact with children 12 months or yo...
More Answers
Dr. Robin Miller, Where Do You Stand In the Vaccine Debate?
Dr. Robin Miller, Where Do You Stand In the Vaccine Debate?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.