CDC issues health advisory over flu vaccine

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By Tami Hoey By Tami Hoey

PHOENIX--- This could be the start of a rough flu season.

The Centers for Disease Control issued a health advisory, warning that the vaccine developed for the 2014-2015 season is less effective than normal.

According to the report, 91% of cases nationwide have been a strain of Type A Influenza, which is the most severe and potentially deadly strain.

However, the vaccine has been effective in only 48% of the Type A cases.

"Flu vaccines are 70-75% effective on a good year," Jessica Rigler of the Arizona Department of Health Services told 3TV.

"We have concerns about a bad flu season from a number of fronts.  One, that the vaccine isn't a perfect match for what we see circulating.  Plus, because the vaccine isn't as good, people might not get vaccinated and then we'll see more people getting the flu," Rigler added.

The vaccine is much more effective against strains other than this year's Type A, according to the CDC.

Officially already two months into flu season, Arizona has seen 131 cases.  The CDC considers flu activity "sporadic" in Arizona.

Flu cases usually spike in January and February.

At, you can find a list of locations for flu shots.