Overall, its effectiveness reached 48 percent.
The department, through the 2016 and 2017 season, have given 3,786 flu vaccines so far. But it's 73 percent effective against influenza B viruses, according to the U.S. Centers for Disease Control and Prevention.
Public health officials stress it still makes sense to get the vaccine, as people have roughly 50 percent chance it will prevent the illness or if not, at least turn a rough experience into a more mild case.
Indications are that infections are still rising in certain regions of the country, like the Midwest, but declining in others, like the Northwest.
There have also been sporadic reports from pediatricians of children suffering from the flu.
After the committee selects the strains to be used for the vaccine, manufacturers will produce trivalent formulations with three strains and quadrivalent formulations with four strains for the upcoming season; both trivalent and quadrivalent shots are equally recommended, according to Flannery. "The prediction for the H3N2 virus was right on in terms of that particular virus continuing to be a dominant virus". A person can also contract the flu by touching a surface or object that has the virus on it and then touching their own face, mouth or nose, according to Goldberg.
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These findings were based on data from more than 3,100 children and adults with acute respiratory illness seen during November 28, 2016, to February 4, 2017, at five sites with outpatient clinics in the United States. It is important that those who have underlying health conditions or may be caregivers of high-risk individuals check with their physicians or healthcare providers about antiviral medications that might help them recover more quickly from the flu, ADPH stressed.
The Tennessee Department of Health reports a small amount of the flu vaccine is available on the first-come-first-served basis at local health departments.
Nine out of ten flu sufferers this winter have this type of Influenza A.
The findings still suggest the vaccine is much better matched this season than two years ago, the last severe flu outbreak, when the shot was only 1 percent effective against the predominant circulating strain of the virus.
Brammer added that folks aren't out of the woods yet.
"That is a good sign, but we're just starting the peak, so it's possible that still could happen", Espinoza said.