As of Tuesday, 593 United Airlines employees failed to comply with the vaccination policy that required proof of inoculation by Monday evening. These employees spanned all work groups. Around 2,000 employees received exemptions from the mandate for religious or medical reasons. The company will be terminating the non-compliant employees over the next few weeks and will work with employees who might change their mind about getting vaccinated.
See "Nearly 600 United Airline employees face termination", Leslie Josephs, CNBC, September 29, 2021