Transatlantic pharmacy group Walgreens Boots Alliance raised its guidance for the remaining two quarters of its financial year on Wednesday, thanks in part to more people coming into its stores to get Covid-19 vaccinations. Walgreens has been under pressure from online competition, a lack of inflation in drug prices and a lockdown-induced dearth of customers needing things like cold medicine. Yet the latter's stock is still a third below its 2018 high, and Executive Chairman Stefano Pessina has explored taking the firm private.