Centers for Disease Control
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What should I do to protect my loved ones from flu this season?
Encourage your loved ones to get vaccinated as soon as vaccine becomes available in their communities, preferably by October. Vaccination is especially important for people at high risk for serious flu complications and their close contacts. People at High Risk of Developing Flu–Related Complications
Children between 6 months and 8 years of age may need two doses of flu vaccine to be fully protected from flu. Your child’s doctor or other health care professional can tell you whether your child needs two doses. Visit Children, the Flu, and the Flu Vaccine for more information.
Children younger than 6 months are at higher risk of serious flu complications, but are too young to get a flu vaccine. Because of this, safeguarding them from flu is especially important. If you live with or care for an infant younger than 6 months of age, you should get a flu vaccine to help protect them from flu. See Advice for Caregivers of Young Children for more information.
In addition to getting vaccinated, you and your loved ones can take everyday preventive actions like staying away from sick people and washing your hands to reduce the spread of germs. If you are sick with flu, stay home from work or school to prevent spreading influenza to others.
When should I get vaccinated?
CDC recommends that people get vaccinated against flu soon after vaccine becomes available, preferably by October. It takes about two weeks after vaccination for antibodies to develop in the body and provide protection against the flu. Doctors and nurses are encouraged to begin vaccinating their patients soon after vaccine becomes available, preferably by October so as not to miss out on opportunities to vaccinate. Those children 6 months through 8 years of age who need two doses of vaccine should receive the first dose as soon as possible to allow time to get the second dose before the start of flu season. The two doses should be given at least 4 weeks apart.
How long does a flu vaccine protect me from getting the flu?
Multiple studies conducted over different seasons and across vaccine types and influenza virus subtypes have shown that the body’s immunity to influenza viruses (acquired either through natural infection or vaccination) declines over time. The decline in antibodies is influenced by several factors, including the antigen used in the vaccine, the age of the person being vaccinated, and the person’s general health (for example, certain chronic health conditions may have an impact on immunity). When most healthy people with regular immune systems are vaccinated, their bodies produce antibodies and they are protected throughout the flu season, even as antibody levels decline over time. Older people and others with weakened immune systems may not generate the same amount of antibodies after vaccination; further, their antibody levels may drop more quickly when compared to young, healthy people. For everyone, getting vaccinated each year provides the best protection against influenza throughout flu season. It’s important to get a flu vaccine every season, even if you got vaccinated the season before and the viruses in the vaccine have not changed for the current season.
Article published by the Centers for Disease Control and Prevention