Influenza is a contagious disease that is caused by viruses. The virus is spread mainly by droplets made when people cough, sneeze or talk. Symptoms can be mild to severe and can include fever (usually 101° - 102°F), chills, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, and tiredness. Some people may have vomiting and diarrhea, though this is more common in children than adults. Influenza can cause severe complications in the very young, very old and in persons of any age with chronic medical conditions. It can also cause complications in pregnant women. Influenza can be prevented by receiving the appropriate influenza vaccine that is specific for your age range. The Advisory Committee on Immunization Practices (ACIP) recommends that everyone aged 6 months and older receive an influenza vaccination annually. Children 6 months through 8 years of age may require 2 doses (separated by 4 weeks) of vaccine if they are getting vaccinated for the first time.
Women who are or will be pregnant during influenza season should receive IIV. Live attenuated influenza vaccine (LAIV) is not recommended for use during pregnancy. Adults and children who have chronic medical conditions such as pulmonary (including asthma) or cardiovascular (except isolated hypertension), renal, hepatic, neurological, hematologic, or metabolic disorders (including diabetes mellitus); and persons who have immunosuppression (including immunosuppression caused by medications or by HIV infection) should receive a flu vaccine annually.
Persons who report having had reactions to egg involving such symptoms as angioedema, respiratory distress, lightheadedness, or recurrent emesis; or who required epinephrine or another emergency medical intervention may receive RIV3, if aged 18 through 49 years and there are no other contraindications. If RIV3 is not available or the recipient is not within the indicated age range, such persons should be referred to a physician with expertise in the management of allergic conditions for further risk assessment before receipt of vaccine.