Pfizer-BioNTech vaccine lead: Boosters could be every 12 or 18 months

Speaking to CNBC's Tania Bryer after the 2021 WIRED Health:Tech event, BioNTech co-founder and chief medical officer, Ozlem Tureci, who led the development of the company's Covid vaccine, reveals what her team is doing to ensure its vaccine is effective against new variants.