Influenza (commonly called "the flu") is a common and contagious respiratory illness caused by viruses. The flu can result in severe illness and life-threatening complications. Out of every 100 U.S. residents, 5 to 20 get the flu each year.
Flu symptoms include high fever, headache, extreme tiredness, coughing, sore throat, runny or stuffy nose, and muscle aches. Some sufferers, especially children, have nausea, vomiting and diarrhea.
Influenza viruses are spread when a person who has the flu coughs, sneezes or speaks. The viruses spread into the air, and other people inhale them. Flu can also be spread when a person touches a surface that has viruses on it (such as a door handle) and then touches his or her nose, eyes or mouth.
Pregnancy and the flu
Complications of flu, such as bacterial pneumonia and dehydration, can be serious and even fatal. Pregnancy can increase the risk of these and other complications. Pregnant women are more likely to be hospitalized from complications of the flu than non-pregnant women of the same age. Pregnancy can change a pregnant women's immune system and affect her heart and lungs. These changes can increase the risk for complications from the flu.
Flu shots are generally considered safe at any stage of pregnancy. Almost all women who will be pregnant during flu season (November through March) should receive a flu shot. The only exception is pregnant women who are allergic to eggs. Eggs products are used to make the vaccine.
Pregnant women should get a flu shot, but avoid the nasal flu mist vaccine (LAIV). It is not approved for use by pregnant women.
To lower the chances of having the flu spread within your household, it's a good idea for family members to get flu shots. Here are some other tips for preventing the flu:
If you think you may have the flu
Pay attention to your body. If you have flu-like symptoms, call your health care provider right away. You provider may prescribe an antiviral medication.
If you do have the flu, get lots of rest, and drink a lot of nonalcoholic liquids. Do not use over-the-counter cold and flu medications, herbal products or dietary supplements without first talking to your health care provider. Not all over-the-counter medications are safe to take during pregnancy.
For more information
Read the March of Dimes article on influenza and children.
To find a clinic in your area that provides flu shots, visit the Web site Flu Clinic Locator.
Visit the Web site of the U.S. Centers for Disease Control and Prevention.
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