September 23, 2021: -Amazon gave away cars and $100,000 cash bonuses to a handful of vaccinated warehouse workers as its running sweepstakes to encourage employees to be inoculated.

Four warehouse workers and a Whole Foods employee were awarded cars worth $40,000 after providing proof of Covid-19 vaccination. On Monday, the company announced in an Instagram post on its “Amazon Vest Life” account, distributing news and lifestyle content for front-line employees.

In the previous week, three warehouse and Whole Foods employees were given $100,000 cash awards for getting vaccinated, Amazon said in a separate Instagram post.

In August, Amazon launched sweepstakes to reward employees who’d gotten the Covid-19 vaccine and encourage holdouts to get their doses. Called “Max Your Vax,” it offers employees the chance to win cars, a week of paid time off complete with a $12,000 vacation package, and cash awards worth $100,000 and $500,000.

According to Amazon, a total of 18 prizes worth nearly $2 million will be awarded this month through October 21. To participate, employees provide proof that they’re fully vaccinated via an internal website.

Amazon said it believes getting vaccinated is critical for employees to protect themselves and their communities. Amazon has held above 1,500 on-site vaccination events for employees and their families, the company added.

Amazon hasn’t required its front-line workers to get vaccinated, but these sweepstakes serve as a nudge to encourage vaccination. Amazon is offering bonuses of up to $100 to employees and new hires who show proof of immunization.

Amazon is eager for its hundreds of thousands of front-line workers to get vaccinated as the Covid delta variant spreads rapidly all over the globe. The company has resumed some coronavirus safety measures previously in place, including mask mandates in U.S. warehouses. Additionally, the Seattle Times reported that Amazon works to restart its coronavirus testing program in its warehouses after winding down its on-site testing facilities.