BBC News:- All New Yorkers will need to be vaccinated if they want to go to work, the city's mayor has announced. Public sector employers already have to be inoculated, but the mandate will now be extended to all private sector employees, Bill de Blasio told MSNBC. The policy will take effect on 27 December, he said. 'We in New York City have decided to use a pre-emptive strike,' said Mr de Blasio, who leaves office in early January. 'We've got Omicron as a new factor, we've got the colder weather which is going to really create new challenges with