The makers of COVID-19 vaccines are figuring out how to tweak their recipes against worrisome virus mutations and regulators are looking to flu as a blueprint if and when the shots need an update.
New York Governor Andrew Cuomo said there are no signs the variant has spread to anyone else in the state. But vaccine makers are bracing to retool vaccines regularly to address variants.
Just because a variant is more contagious doesn't mean it'll be impervious to vaccination. But the variant first identified in South Africa is raising concerns.