A poorly matched flu shot could mean a bad flu season on top of a Covid surge (nbcnews.com)
Research suggests that this year's flu shot is not a good match for the main strain of influenza in circulation right now.
The current flu vaccines appear to be a bad match for the dominant strain so far this influenza season, new research suggests, leading experts to warn that the United States could be in for a bad flu season, on top of what’s already shaping up to be another
devastating surge of Covid cases.
Before each flu season, scientists must predict which strains will be the most common, and design a flu shot to match these predictions. This year’s flu shot includes four strains.
But one, a version of the H3N2 strain of influenza, is turning out to be a bad match for the version of H3N2, called 2a2, that’s in wide circulation in the U.S., according to a study from Scott Hensley, a professor of microbiology at the University of Pennsylvania. Hensley’s study was posted Wednesday to a preprint server, meaning it has not yet been peer-reviewed...