The organizers of the Eurovision Song Contest in Rotterdam Ahoy, The Netherlands announced that contestants, entourage and journalists should be thoroughly tested in their own countries and quarantaine themselves for 5 days prior going to The Netherlands. 

There will be extensive testing, wearing of masks, hygiene measurements, good ventilation and everyone keeping 1.50 meter distance.

Mouth masks have to be worn at all times except when performing. 

If artists are tested positive or feeling unwell, videos of their performance recorded in their own country will be shown.

It is not yet known if an audience will be allowed.