Unions in Hollywood have taken the decision to extend their Covid protocols and mandatory vaccinations until early next year.

The measures, which will be in place until 15 January, include strict testing, physical distancing, Covid compliance officers and diligent use of personal protective equipment.

A "Zone" system is being used on sets to ensure that different sections of productions are tightly controlled based on proximity to cast, who often can't wear masks or maintain social distancing while working.

The rules concerning vaccinations are most strictly enforced in Zone A where unmasked actors work and many productions started enforcing a vaccination policy last July.

Unions and Hollywood executives agree that the protocols have enabled jobs and productions to safely return back to work during the pandemic.