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Ency. home > Disease > I > Influenza

Influenza    See images

Overview | Symptoms | Treatment | Prevention

Alternative names:

Flu; Influenza A; Influenza B; rarely Influenza C

Prevention

Flu shots are recommended annually for people who are 50 years of age or older, anyone with chronic heart, lung or kidney conditions, and those living in institutions. The vaccine has a 60% to 70% success rate in preventing infection among individuals with normal immune systems; efficacy is lower in individuals with weakened immune systems. The influenza vaccine should not be given to people who are allergic to eggs.

Approximately 8 million children and adolescents between 6 months and 17 years of age have one or more medical conditions that put them at increased risk of influenza-related complications. These children should be given the first vaccine available. Such children include those with chronic disorders of the heart or lungs (such as asthma and cystic fibrosis), children who have required regular medical follow-up or hospitalization during the preceding year because of chronic metabolic diseases (including diabetes mellitus), kidney dysfunction,  sickle cell anemia, or immunosuppression.  Children and teenagers (aged 6 months to 18 years) who are receiving long-term aspirin therapy and therefore might be at risk for developing Reye syndrome after influenza infection and
adolescents who will be in the second or third trimester of
pregnancy during the influenza season should also be vaccinated.

For unvaccinated individuals who have been exposed to people with known influenza, especially if the exposed individual has risk factors, potential use of antiviral medication for more than 2  weeks and vaccination may help prevent illness.

Ency. home > Disease > I > Influenza


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