Israel’s coronavirus vaccination campaign, the world’s fastest per capita, has shifted to booster shots in a bid to protect the most vulnerable citizens by next month and ease curbs on the economy.

Israelis over the age of 60, those with health problems and medical personnel have been receiving first injections of Pfizer Inc vaccines since Dec 19. As three weeks have passed, they are beginning to be due for follow-up final doses.

“It changes everything,” said Guy Choshen, a director of the Covid-19 ward at Tel Aviv’s Ichilov Hospital, who got his second injection. “I’m really happy that I’m over that [and] looking forward for all this epidemic to be finished.”