Bono has left behind a terrible week by recruiting some very famous people to appear in an advert to tackle the Ebola crisis.

One, the U2 frontman's international advocacy group, works to raise public awareness and work with political leaders to combat AIDS and preventable diseases, and this time Ebola is on its radar. This star-studded video is an entirely silent call-to-action trying to convince 250,000 people to sign a petition to “tell world leaders it’s time to stop the outbreak now AND build health systems that could stop crises like this from happening ever again.”

Featuring Matt Damon, Connie Briton, Thandie Newton, Morgan Freeman and many others, it's a powerful video the uses silence to say a lot. You can watch the video below: