It’s that time of year again, early autumn, when flu experts recommend getting the seasonal flu vaccine, especially for children and individuals over 65. Of course, if you don’t think you should get the vaccine, there’s a description for a person like you.
One of the issues that has been observed in the past is that the traditional flu vaccines may not have a high effectiveness in older adults. In fact, recent research shows that, in patients over 65 years old, the effectiveness of the flu vaccines can be as low as 9% for some strains of the influenza A virus (but still strong effectiveness for that group for other strains of influenza A and all strains of the influenza B virus).
The lower effectiveness may not be a result of the vaccine itself, but because older individuals may require more antigen to induce a proper immune response. Because of these observations, Sanofi Pasteur developed a high dose version of their Fluzone vaccine specifically for seniors. The new high dose vaccine contains 60 μg of each of the three hemagglutinin antigens per vaccine dose compared to the 15 μg per antigen in the standard Fluzone dose.Read More »Improved high dose flu vaccine for seniors