Italy has had to cut its daily rollout of COVID-19 shots by more than two thirds and will have to rethink its whole vaccination program if supply problems persist, a senior health official said on Saturday.

Axar.az informs that vaccinations have slowed to 20,000-25,000 a day from peaks of more than 90,000 around two weeks ago, after delays in deliveries from U.S. drugmaker Pfizer Inc, Franco Locatelli, the head of Italy’s higher health council, said.

Now that AstraZeneca Plc has also warned of cuts in deliveries to its doses - even as they await clearance for use in the bloc - Italy might have to redraw its national plan at the end of the month, he told a press conference.

Rome has threatened to sue Pfizer which said last week it was temporarily slowing supplies to Europe to make manufacturing changes that would boost output.