Watch CNBC's full interview with Pfizer CEO Albert Bourla

CNBC's Meg Tirrell and the 'Squawk Box' team sit down with Pfizer CEO Albert Bourla to discuss recent data from the company that suggests its Covid-19 booster neutralizes the worrisome omicron variant. Bourla breaks down what the data means for the pharma giant and its early development of an omicron-specific vaccine. "I think we will need a fourth dose. I have said that multiple times," Bourla tells CNBC.