LANSING, Mich. (Great Lakes News) – United Airlines said nearly 600 of its employees are facing termination for refusing to get a COVID-19 vaccine.

The company announced a vaccine mandate policy in August, which gave employees until Monday, Sept. 27 to show proof they had received at least one shot.

MORE NEWS: U.S. Senator Elissa Slotkin to Deliver Dem Response to Trump’s Speech

A United spokesperson said the vaccine policy has benefited the company’s recruiting and that new workers are applying specifically because of the mandate.