United Airlines said on Thursday that one day after the company's dismissal order was issued, nearly half of its 593 employees facing dismissal for refusing to be vaccinated have provided proof of vaccination, and currently 320 have not provided proof.

United Airlines said on Tuesday that after this week's deadline, as many as 593 employees faced dismissal for refusing to get the COVID-19 vaccine.

The vaccination deadline set by United Airlines for its approximately 67,000 US employees is September 27. The company said 2,000 employees applied for exemptions for medical or religious reasons. The company plans to evaluate these requests by October 15, when exempted employees will face unpaid leave.

However, as of September 28, 593 employees still refused to comply with the policies or requested no exemptions. United Airlines said it will begin the dismissal process for these employees on Tuesday, which is in line with the employees' collective bargaining agreement.