America's third largest airline, Delta, is to impose a $200 (£145) monthly surcharge on employees who are not vaccinated against Covid-19.
It will also only pay sick pay to Covid sufferers who have been double-jabbed but still get infected.
Boss Ed Bastian said it would help stem the "aggressive spread" of coronavirus as infections rise across the US.
It is the latest attempt by a big firm to cajole staff into getting jabbed.
In a memo to staff, Mr Bastian said Delta's surcharge would apply from 1 November to staff enrolled in its healthcare insurance plan, meaning most of its 75,000 workers will be affected. สล็อตpgทดลองเล่น
He said the average hospital stay for Covid-19 now costs Delta $50,000 per person which is untenable.
"This surcharge will be necessary to address the financial risk the decision to not vaccinate is creating for our company," he said.
"In recent weeks since the rise of the B.1.617.2 variant, all Delta employees who have been hospitalised with Covid were not fully vaccinated."
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From 30 September unvaccinated Delta staff will also have to take weekly Covid tests and wear masks in all indoor Delta settings.