Experts from the United States Center for Disease Control has unveiled that the flu vaccine for this year is less effective than being predicted before. The vaccine has been found to be just 18% effective against the H3N2 dominant strain.
In the case of children aged between two and eight, the protection level of the injection form of the vaccine was found to be just 15%. Injection form is better as sometimes, the nasal spray may not turn out to be effective at all.
It is a matter of concern for experts and health officials, who think that low protection level is because the viruses are mutated and appear to be different than being covered by the vaccine. The choice of strains to be included in the vaccine is made many months before, so that manufacturers get sufficient amount of time to make sufficient amount of vaccines.
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