'I think we will need a fourth dose': Pfizer CEO responds to alarming Omicron findings

The Omicron variant is expected to overtake the Delta variant to become the strain worldwide. The variant is thought to be more transmissible than its predecessor but its severity is still unclear. However, early research suggests the variant reduces some of the protection conferred from the Pfizer jab and further action will most likely be needed, Pfizer CEO Albert Bourla told CNBC.

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