Albert Bourla, Chief Executive Officer of US-based pharmaceutical giant Pfizer, encountered a series of tough questions about the efficacy of its Covid vaccine on the sidelines of the ongoing World Economic Forum, but he repeatedly ignored them.

People at Davos have a tendency to overstate the importance of the gathering, and they have perhaps been spoiled by the obsession Biden's predecessor, Donald Trump, showed with the place.

Swedish climate activist Greta Thunberg accused attendees of the World Economic Forum in Davos of "fuelling the destruction of the planet" as she arrived at the event in the Swiss Alps on Thursday.