Faced with the Omicron wave of infections, Amazon will pay its U.S. warehouse workers $40 to get the vaccine booster shot. One of the country’s biggest employers, Amazon is continuing to use financial incentives to ensure that low-paid hourly workers are fully vaccinated.

Amazon told its army of hourly workers, which includes some 750,000 U.S. warehouse employees, that those who can prove they’ve had the booster will receive the payment as well as the option of an unpaid day off work, according to an internal message sent earlier this week viewed by The Information.