Yes, but be sure to get the shot and not the nasal spray flu vaccine. The spray vaccine contains live flu virus and should be avoided during pregnancy.

The flu shot is considered an important part of prenatal care. Changes in a woman’s immune system, heart, and lungs during pregnancy make her more susceptible to infection that can lead to serious illness. The flu also increases the risk of miscarriage and preterm birth.

A pregnant woman’s flu shot is also considered an important part of newborn care. Babies can’t be given flu vaccines until they are 6 months old, but a pregnant woman can pass immunity to her baby in the form of antibodies. This protection will last for several months. In addition, the flu vaccine reduces the infant’s risk of exposure to the virus; a mother who is less likely to get the flu herself is less likely to pass it along to her child.

For these reasons, the CDC urges all women—regardless of trimester—to get a flu shot if they will be pregnant during flu season. In addition, mothers of babies younger than 6 months old should be vaccinated to help protect their baby’s health.

You may be concerned about the presence of thimerosal in flu vaccines. Single-dose vials of flu vaccines do not contain the preservative, so ask your health care provider if a single-dose vial is available. Even if it is not, the CDC still urges all pregnant women to get a flu shot since it provides important protection for mothers and babies.

If you are allergic to eggs, the CDC now recommends getting the flu vaccine in two doses (10 percent/90 percent) and watching for signs of a reaction after each dose. The only individuals advised to avoid getting a flu shot are those with a history of serious reactions (anaphylaxis) to the flu vaccine.

It’s important to remember that persons getting a flu shot can still get infected with other types of flu virus. So be sure to call your doctor right away if you develop any flu-like symptoms. Early treatment is important for your health, and the health of your baby.