US news network CNN has fired three employees for going into an office without having been vaccinated against COVID-19.

It is one of the first examples of a US firm firing staff for breaching a company vaccination mandate.

It is legal in the US for firms to require employees to be vaccinated.

Many large firms - including Facebook and Google - say they will require employees to be vaccinated when offices fully re-open in the months ahead.

[Source:  BBC]