Please Note: CDC’s Advisory Committee on Immunization Practices (ACIP) voted in favor of an interim recommendation that live attenuated influenza vaccine (LAIV), also known as the “nasal spray” flu vaccine, should not be used during the 2016-2017 flu season. ACIP continues to recommend annual flu vaccination, with either the inactivated influenza vaccine (IIV) or recombinant influenza vaccine (RIV) for everyone 6 months and older. The ACIP vote follows data showing poor or relatively lower effectiveness of LAIV from 2013 through 2016. For more information, see the CDC Media Statement, Medscape Article and Recommendations of the ACIP 2016-2017 Influenza Season MMWR.
Influenza Vaccination is recommended for all persons age 6 months and older. Seasonal influenza (flu) vaccination is the most important way of preventing seasonal influenza virus infections and potentially severe complications, including death. Seasonal influenza vaccination reduces the likelihood of becoming ill with influenza or transmitting influenza to others.
Pediatric offices may choose to serve as an alternate venue for providing influenza immunization for parents and other care providers of children. Medical liability issues and medical record documentation requirements need to be considered before a pediatrician begins immunizing adults in the office. learn more at: www.aap.org/immunizations
Trivalent flu vaccines protect against two influenza A viruses and one influenza B virus. The following trivalent flu vaccines are available:
Quadrivalent flu vaccines protect against two influenza A viruses and two influenza B viruses. The following quadrivalent flu vaccines are available:
Influenza vaccines are continually monitored for safety and efficacy. While influenza vaccines have proven to be very safe, some people should not be vaccinated, or should speak to the doctor before getting vaccination.
People who can't get the flu shot:
Note: There are certain flu shots that have different age indications. For example people younger than 65 years of age should not get the high-dose flu shot and people who are younger than 18 years old or older than 64 years old should not get the intradermal flu shot.
People who should talk to their doctor before getting the flu shot:
For more information about flu vaccine safety, visit CDC's webpage Influenza Vaccine Safety
Influenza is more likely to cause severe illness in pregnant women than in women who are not pregnant. Changes in the immune system, heart, and lungs during pregnancy make pregnant women more prone to severe illness from influenza as well as hospitalizations and even death. Pregnant women with influenza also have a greater chance for serious problems for their unborn babies, including premature labor and delivery. Because vaccinating against influenza before the season begins is critical, and because predicting exactly when the season will begin is impossible, routine influenza vaccination is recommended for all women who are or will be pregnant (in any trimester) during influenza season, which in the United States is usually early October through late March.
Neither CDC nor ACOG recommend one type of flu vaccine. All influenza vaccines available are recommended for use in pregnant women, with the exception of the live intranasal vaccine.
The seasonal flu shot has been given safely to millions of pregnant women over many years. Flu shots have not been shown to cause harm to pregnant women or their babies. CDC and FDA conduct ongoing monitoring of the safety of seasonal influenza and other vaccines licensed for use in the United States, in cooperation with state and local health departments, health care providers, and other partners. Monitoring the safety of seasonal flu vaccine in pregnant women is part of this effort.
There have been no reports of any adverse outcomes in pregnant women or their infants. Thimerosal, a mercury-containing preservative used in multidose vials, has not been shown to cause any adverse effects except for occasional local skin reactions. There is no scientific evidence that thimerosal-containing vaccines cause adverse effects in children born to women who received vaccines with thimerosal. Hence, ACIP does not indicate a preference for thimerosal-containing or thimerosal-free vaccines for any group, including pregnant women (Committee Opinion #608).
All flu vaccines are either pregnancy category B or C. These are categories assigned by the FDA. Pregnancy Category B means that tests in animals have failed to demonstrate adverse effects on the fetus, however sufficient testing in pregnant women has not been conducted. Pregnancy Category C means that animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women.
Despite these categories influenza vaccines are recommended by CDC because millions of doses have been given to pregnant women with no adverse events occurring.