Early data show this season’s flu vaccine has not been effective

Interim estimates published Thursday in MMWR indicate that this season’s influenza vaccine has not been effective.
Based on data from more than 3,600 children and adults, CDC epidemiologist Jessie R. Chung, MPH, and colleagues estimated that the vaccine has been 16% effective against mild or moderate influenza caused by the predominant circulating virus, influenza A(H3N2), with a 95% confidence interval (-16% to 39%) that suggests vaccination “did not significantly reduce the risk of outpatient medically attended illness” caused by H3N2.
It was the first time the CDC has been

Interim estimates published Thursday in MMWR indicate that this season’s influenza vaccine has not been effective.
Based on data from more than 3,600 children and adults, CDC epidemiologist Jessie R. Chung, MPH, and colleagues estimated that the vaccine has been 16% effective against mild or moderate influenza caused by the predominant circulating virus, influenza A(H3N2), with a 95% confidence interval (-16% to 39%) that suggests vaccination “did not significantly reduce the risk of outpatient medically attended illness” caused by H3N2.
It was the first time the CDC has been