By Amy M. Scholte, USA TODAY Editor The Centers for Disease Control and Prevention says it’s “very likely” that a pilot study involving the flu shot could have a negative effect on flu vaccination rates.
The agency said Tuesday it received the first data about the flu vaccination safety issue from a group of doctors at Vanderbilt University in Nashville.
The study, which is being conducted by the National Institute of Allergy and Infectious Diseases (NIAID), was not made public.
The CDC says it can’t yet say whether the study’s findings are cause for concern or whether the findings will prompt more research into the potential effect of flu vaccination on vaccine effectiveness.
It said in a statement it was “very confident” the study will provide further evidence to support its safety concerns.
The new data comes after the CDC said in April that the flu shots are a safe and effective way to prevent influenza.
A number of states have seen spikes in the number of flu shots issued since the start of the pandemic in late March, prompting some to request the vaccine.