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As the seasons change and the colder weather approaches, it’s time to prepare for the annual return of one of the most preventable illnesses we face: influenza. Unlike the many respiratory viruses for which there is no effective vaccine or drug treatment, those which cause the common cold, bronchitis and sinus infections, influenza is both preventable and treatable.
Unfortunately, just as we are seeing with many bacterial infections, some influenza virus strains are becoming resistant to the few anti-viral medications available to treat the illness. Fortunately, during the years when the vaccine is well-matched to the active strains, its effectiveness in preventing infection can be as high as 70-90 percent.
Flu season typically does not reach its peak until January or February; but it can begin as early as October and run as late as May. It usually takes about two weeks for the vaccine to begin to protect you; so waiting until close contacts are sick may be waiting too long.
Flu vaccine for the 2008-2009 season is now available and no shortage is predicted. Important changes and updates have been made to the 2008 recommendations including
o Annual vaccination of all children ages 5-18 is now recommended.
o Children age 6-months – 59-months with health conditions which place them at increased risk from influenza complications should be vaccinated.
o Children age 6-months – 8 years should receive 2 doses of vaccine (separated by 4 or more weeks) if they have not had a 2-dose vaccination series in any prior year.
o Either influenza vaccine injection or live attenuated (nasal spray) vaccine can be used when vaccinating healthy persons aged 2-49.
o Children age 6-23 months, children with possible reactive airway disease (asthma, recurrent wheezing or recent wheezing episodes), and adults older than 49 or persons at higher risk for complications from influenza should receive the influenza vaccine injection not the nasal spray vaccine.
Many misconceptions still exist about flu vaccine.
- The most common misconception is that the vaccine will cause influenza.
- While the effect of stimulating your immune system to make antibodies which will protect you may cause low grade fever, soreness or redness at the vaccine site or mild achiness, these are not symptoms of the flu but are signs that your immune system is responding to the vaccine.
- The vaccine doesn’t work.
- The effectiveness of the vaccine does vary with the match of the strains chosen; however, in 16 of the last 20 U.S. flu seasons, the viruses in the vaccine have been well matched to the predominant circulating strains. Further, even in years when the circulating strains do not match the vaccine, cross-reacting protection may still provide enough protection to lessen the severity of the illness and prevent flu-related complications.
- I don’t need to be vaccinated as long as other people around me do.
- While it’s true that populations can develop a certain degree of “herd” immunity when a enough people become immune that the virus cannot spread easily across the community, that protection only works if the majority of vulnerable individuals are vaccinated before the illness emerges in the area. Further, there is a real moral hazard in counting on others to be responsible for protecting you and your family. Obviously, if everyone opted for the free ride, no one would be protected.
Influenza remains a major cause of severe illness, hospitalization and death, especially in the most vulnerable among us: the very young, the very old and those with serious medical conditions.
Much of that could be avoided if everyone were to take responsibility for their own health and for the health of their family and community by getting their flu shot every year.
For more information, see the Center for Disease Control and Prevention (CDC) website at:
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