The US Food and Drug Administration granted full approval to Pfizer Inc. and BioNTech SE’s COVID-19 vaccine 23 August, giving the companies the distinction of having the first vaccine for SARS-CoV-2 to transition from the more preliminary emergency use authorization to the gold-standard FDA clearance. But the much coveted designation lacks one element normally permitted by agency approval: off-label use.
With the delta variant hitting the US hard, children returning back to in-person schooling, and concerns around potential waning protection...







